Archive for April, 2019

George Zimmerman was banned from Tinder over user safety …

George Zimmerman the man who was acquitted of murder charges in the shooting death of unarmed teen Trayvon Martin in 2012 has been banned from Tinder.

A spokesperson for Tinder told the Huffington Post on Sunday that Zimmerman's profile had been deleted, citing user safety.

"At Tinder, we take our users' safety very seriously and our team has removed this profile from our platform," the spokesperson said.

The spokesperson did not elaborate on why Zimmerman was removed from the dating platform.

Screen grabs from Zimmerman's Tinder profile were published by Creative Loafing Tampa Bay on April 17.

The screen grabs show Zimmerman's bio, which said: "I'm looking for carefree, fun! I love the outdoors, fishing camping and hiking. I love adventure not into huge crowds. I'm also down for a quiet night with Longhorn take out."

Zimmerman's profile was removed from Tinder months after Bumble banned him from its platform in December.

Read more: A woman sent more than 159,000 text messages to a man she's accused of stalking after going on a single date, according to police

He was banned again from the cite recently after creating an unverified profile, a Bumble spokesperson told CNN.

"We have thousands of moderators working tirelessly with our users to make Bumble the safest and most empowering social networking platform and this is another example of those efforts," the spokesperson said.

Zimmerman was found not guilty of second-degree murder in 2013 for Martin's death.

In 2015, he was arrested on suspicion of aggravated assault and domestic violence, though prosecutors did not file charges.

In 2017, he threatened to "beat" Jay-Z over the rapper's docuseries about Martin. In 2018 he was accused of stalking a private investigator who contacted him on behalf of producers behind Jay-Z's docuseries.

Read this article:
George Zimmerman was banned from Tinder over user safety ...

Donald Trump Is on the 2019 TIME 100 List | Time.com

Every modern U.S. President tries to influence the world. President Donald Trump has done this through opposing the NATO countries not paying their fair share, pushing China and our North American neighbors for fairer trade agreements and withdrawing from the Iran nuclear agreement. His boldest move in this direction is likely his personal efforts on the issue of North Korea. President Trump has, in fact, used the past year to place his imprint on a problem spanning more than six decades.

Despite denuclearization agreements in 1992, 2005 and 2008, North Korea has become a nuclear power. President Trump decided to ramp up sanctions early in his tenure (which other Presidents have done) but decided to take a very different tack thereafter.

In June 2018 President Trump broke with decades of U.S. policy and held a summit with North Korean Chairman Kim Jong Un in Singapore. The President believes that only personal diplomacy can solve this crisis. The Presidents supreme confidence in his own ability to persuade others to make a deal is now the basis for American denuclearization policy toward North Korea.

President Trump deserves great credit for daring to try to personally persuade Chairman Kim to join the family of nations. This approach holds the possibility for historymaking changes on the Korean Peninsula to make us all safer.

Christie, a Republican, is a former governor of New Jersey

Visit link:
Donald Trump Is on the 2019 TIME 100 List | Time.com

Cosmic censorship hypothesis – Wikipedia

The weak and the strong cosmic censorship hypotheses are two mathematical conjectures about the structure of gravitational singularities arising in general relativity.

Singularities that arise in the solutions of Einstein's equations are typically hidden within event horizons, and therefore cannot be observed from the rest of spacetime. Singularities that are not so hidden are called naked. The weak cosmic censorship hypothesis was conceived by Roger Penrose in 1969 and posits that no naked singularities, other than the Big Bang singularity, exist in the universe.

Since the physical behavior of singularities is unknown, if singularities can be observed from the rest of spacetime, causality may break down, and physics may lose its predictive power. The issue cannot be avoided, since according to the Penrose-Hawking singularity theorems, singularities are inevitable in physically reasonable situations. Still, in the absence of naked singularities, the universe, as described by the general theory of relativity, is deterministic:[1] it is possible to predict the entire evolution of the universe (possibly excluding some finite regions of space hidden inside event horizons of singularities), knowing only its condition at a certain moment of time (more precisely, everywhere on a spacelike three-dimensional hypersurface, called the Cauchy surface). Failure of the cosmic censorship hypothesis leads to the failure of determinism, because it is yet impossible to predict the behavior of spacetime in the causal future of a singularity. Cosmic censorship is not merely a problem of formal interest; some form of it is assumed whenever black hole event horizons are mentioned.[citation needed]

The hypothesis was first formulated by Roger Penrose in 1969, and it is not stated in a completely formal way. In a sense it is more of a research program proposal: part of the research is to find a proper formal statement that is physically reasonable and that can be proved to be true or false (and that is sufficiently general to be interesting).[2] Because the statement is not a strictly formal one, there is sufficient latitude for (at least) two independent formulations, a weak form, and a strong form.

The weak and the strong cosmic censorship hypotheses are two conjectures concerned with the global geometry of spacetimes.

The weak cosmic censorship hypothesis asserts there can be no singularity visible from future null infinity. In other words, singularities need to be hidden from an observer at infinity by the event horizon of a black hole. Mathematically, the conjecture states that, for generic initial data, the maximal Cauchy development possesses a complete future null infinity.

The strong cosmic censorship hypothesis asserts that, generically, general relativity is a deterministic theory, in the same sense that classical mechanics is a deterministic theory. In other words, the classical fate of all observers should be predictable from the initial data. Mathematically, the conjecture states that the maximal Cauchy development of generic compact or asymptotically flat initial data is locally inextendible as a regular Lorentzian manifold.

The two conjectures are mathematically independent, as there exist spacetimes for which weak cosmic censorship is valid but strong cosmic censorship is violated and, conversely, there exist spacetimes for which weak cosmic censorship is violated but strong cosmic censorship is valid.

The Kerr metric, corresponding to a black hole of mass M {displaystyle M} and angular momentum J {displaystyle J} , can be used to derive the effective potential for particle orbits restricted to the equator (as defined by rotation). This potential looks like:[3]

where r {displaystyle r} is the coordinate radius, e {displaystyle e} and l {displaystyle l} are the test-particle's conserved energy and angular momentum respectively (constructed from the Killing vectors).

To preserve cosmic censorship, the black hole is restricted to the case of a < 1 {displaystyle a<1} . For there to exist an event horizon around the singularity, the requirement a < 1 {displaystyle a<1} must be satisfied.[3] This amounts to the angular momentum of the black hole being constrained to below a critical value, outside of which the horizon would disappear.

The following thought experiment is reproduced from Hartle's Gravity:

Imagine specifically trying to violate the censorship conjecture. This could be done by somehow imparting an angular momentum upon the black hole, making it exceed the critical value (assume it starts infinitesimally below it). This could be done by sending a particle of angular momentum l = 2 M e {displaystyle l=2Me} . Because this particle has angular momentum, it can only be captured by the black hole if the maximum potential of the black hole is less than ( e 2 1 ) / 2 {displaystyle (e^{2}-1)/2} .

Solving the above effective potential equation for the maximum under the given conditions results in a maximum potential of exactly ( e 2 1 ) / 2 {displaystyle (e^{2}-1)/2} . Testing other values shows that no particle with enough angular momentum to violate the censorship conjecture would be able to enter the black hole, because they have too much angular momentum to fall in.

There are a number of difficulties in formalizing the hypothesis:

In 1991, John Preskill and Kip Thorne bet against Stephen Hawking that the hypothesis was false. Hawking conceded the bet in 1997, due to the discovery of the special situations just mentioned, which he characterized as "technicalities". Hawking later reformulated the bet to exclude those technicalities. The revised bet is still open (although Hawking died in 2018), the prize being "clothing to cover the winner's nakedness".[1](see also ThorneHawkingPreskill bet.)

An exact solution to the scalar-Einstein equations R a b = 2 a b {displaystyle R_{ab}=2phi _{a}phi _{b}} which forms a counterexample to many formulations of the cosmic censorship hypothesis was found by Mark D. Roberts in 1985:

where {displaystyle sigma } is a constant.

Read the original here:
Cosmic censorship hypothesis - Wikipedia

Trump planning to pull 7,000 troops from Afghanistan …

The Trump administration is planning to reduce the number of U.S. troops in Afghanistan, with the possibility that some troops begin withdrawing in the coming weeks, according to a U.S. official. The current force of 14,000 is expected to be cut in half, with those troops arriving home by the end of the spring, a second U.S. official said.

A third official told ABC News that discussions have been underway for several weeks about how to withdraw some U.S. troops from Afghanistan.

The president discussed the plan on Wednesday with Defense Secretary James Mattis, Secretary of State Mike Pompeo and national security adviser John Bolton, who all cautioned against the move, according to a fourth U.S. official and another source with knowledge of the meeting. Trump believes withdrawing troops from Afghanistan would appeal to his base and fulfill a campaign promise.

The consideration comes just one day after Trump announced he was pulling 2,000 U.S. troops out of Syria within 30 days.

Asked by a reporter over Thanksgiving if he would withdraw troops from Afghanistan, Trump replied, "We're always looking to do the right thing. We'll be seeing over a period of time, but we're looking."

Late on Thursday, Mattis announced he would leave the office of Defense Secretary on Feb. 28, 2019, writing in a resignation letter about the importance of U.S. alliances and partnerships, issues that Mattis and Trump have clashed over in the past -- including Afghanistan.

Because you have the right to have a Secretary of Defense whose views are better aligned with yours on these and other subjects, Mattis wrote. I believe it is right for me to step down from my position."

Asked whether the president had given any indication he intends to pull troops out of Afghanistan, Sen. Lindsey Graham, R-South Carolina, said on Thursday to ABC News, "I'm concerned about that, but after having been to Afghanistan, it will pave the way for another 9/11.

"It will be the most disastrous decision any president could make as to withdraw our forces from Afghanistan without conditions changing."

There are currently about 14,000 U.S. troops serving in a counterterrorism mission against the Taliban and ISIS and as part of a train, advise, and assist mission for Afghan security forces.

Shortly after entering office, Trump decided to add 3,000 U.S. troops to the mission as part of his South Asia Strategy for the region.

"America will work with the Afghan government as long as we see determination and progress. However, our commitment is not unlimited, and our support is not a blank check," Trump said when announcing the new strategy in August of 2017. "The government of Afghanistan must carry their share of the military, political, and economic burden. The American people expect to see real reforms, real progress, and real results. Our patience is not unlimited. We will keep our eyes wide open."

ABC News' Mariam Khan contributed to this report from Capitol Hill.

Read the original:
Trump planning to pull 7,000 troops from Afghanistan ...

Under Peace Plan, U.S. Military Would Exit Afghanistan Within …

WASHINGTON All American troops would withdraw from Afghanistan over the next three to five years under a new Pentagon plan being offered in peace negotiations that could lead to a government in Kabul that shares power with the Taliban.

The rest of the international force in Afghanistan would leave at the same time, after having mixed success in stabilizing the country since 2001. The plan is being discussed with European allies and was devised, in part, to appeal to President Trump, who has long expressed skepticism of enduring American roles in wars overseas.

The plan calls for cutting by half, in coming months, the 14,000 American troops currently in Afghanistan. It would task the 8,600 European and other international troops with training the Afghan military a focus of the NATO mission for more than a decade and largely shift American operations to counterterrorism strikes.

[For more stories about the experiences and costs of war, sign up for the weekly At War newsletter.]

Various elements of the plan were shared with The New York Times by more than a half-dozen current and former American and European officials. It intends to help talks with the Taliban that are being led by Zalmay Khalilzad, the American special envoy.

So far, the plan has been met with broad acceptance in Washington and NATO headquarters in Brussels. But American officials warned that Mr. Trump could upend the new plan at any time.

And officials said that even if the peace talks broke down, the United States would go forward with shifting to counterterrorism missions from training Afghan forces.

Until the final withdrawal, several thousand American forces would continue strikes against Al Qaeda and the Islamic State, including on partnered raids with Afghan commandos. The counterterrorism missions, and the militarys dwindling presence, are also critical to allowing the C.I.A. to operate in Afghanistan.

Lt. Col. Kon Faulkner, a Pentagon spokesman, said no decisions had been made as peace talks continued. The Defense Department is considering all options of force numbers and disposition, Colonel Faulkner said.

But European allies said they had been consulted about the proposal a stark contrast to Mr. Trumps surprise announcement in December to withdraw American forces from Syria.

The Europeans are perfectly capable of conducting the training mission, James Stavridis, a retired American admiral and former top NATO commander who is now with the Carlyle Group private equity firm. It is a smart division of labor to have the United States shift the bulk of its effort toward the special forces mission and having the Europeans do the training mission.

Mr. Stavridis said the two missions would be coordinated, including American logistical support and military backup for the European troops.

On Monday, American diplomats met with the Taliban in Qatar in the highest-level negotiations yet, including the attendance of Gen. Austin S. Miller, the commander of the international mission in Afghanistan. The negotiations paused on Wednesday and are set to resume on Saturday.

The two sides have sought to flesh out a framework agreement, decided in principle last month, for the full withdrawal of foreign troops and assurances by the Taliban to prevent terrorist groups that seek to attack the United States from using Afghan territory as a safe haven.

The Afghan government has not been a part of the negotiations because of Taliban reluctance to talk to President Ashraf Ghani or his envoys.

The prospect of an American military withdrawal has raised fears across the world that it could lead to the fall of the Western-backed government in Kabul and a return to the extremist rule of the Taliban. Before it was ousted in 2001, the Taliban was accused of human rights abuses, prohibited girls from attending school and imposed harsh penalties on accused heretics.

American officials have said any deal to withdraw international forces from Afghanistan must involve a cease-fire agreement and the inclusion of government leaders in the negotiations.

In a speech on Thursday in Kabul, Mr. Ghani warned Afghan security forces to be prepared for possible Taliban attacks ahead of any peace deal.

Peace is not easy; it needs courage and bilateral honor, Mr. Ghani said.

European officials have previously said they would rapidly pull their forces from Afghanistan if the American military was shorn too small to provide logistic support. American officials said enough troops would remain even if they were cut to 7,000 to continue the European training mission as outlined in the Pentagons plan.

In some respects, the focus on counterterrorism missions in Afghanistan is an endorsement of a plan by Vice President Joseph R. Biden Jr. as the Obama administration debated its own war strategy in 2009. Mr. Bidens proposal was ultimately rejected in favor of a counterinsurgency plan, which called for training local forces and a surge of American troops, as pushed by Gen. Stanley A. McChrystal, who was then the top commander in Afghanistan.

Taliban negotiators deeply oppose the proposal for American counterterrorism troops to remain in Afghanistan for up to five years, and officials were unsure if a shorter period of time would be accepted by the militants rank and file.

Scaling back the training mission could leave the beleaguered Afghan military not just vulnerable to attacks, but at risk of fracturing. In January, Mr. Ghani announced that more than 45,000 Afghan troops had died since 2014; Pentagon officials have called their casualty numbers unsustainable.

Despite pouring billions of dollars into the Afghan military for more than a decade, Pentagon audits show that a renewed effort to modernize the fledgling Afghan Air Force will most likely not be self-sufficient until the mid-2030s.

Speaking to lawmakers in December, the incoming commander for American troops in the Middle East, Lt. Gen. Kenneth F. McKenzie Jr., said that Afghan forces could not sustain themselves without American and NATO support.

I do know that today it would be very difficult for them to survive without our and our coalition partners assistance, he said.

Current and former Defense Department officials said limiting American assistance to the Afghan military would require a delicate balance of providing just enough material support for the NATO training mission, known as Resolute Support, to ensure that Western allies remain invested without sacrificing counterterrorism operations.

European allies cited General Miller as describing the reduced troop levels as about doing more with less.

One former Defense Department official with knowledge of the talks said more American support for the training mission could be based outside Afghanistan and flown in when needed. European countries have relied heavily on American bases, supplies and other logistics throughout the war.

One German official, speaking on the condition of anonymity because of the sensitivity of the talks, underscored how reliant Berlins 1,300 troops are on medical evacuation aircraft and air support provided by the United States.

British forces may take part in counterterrorism operations, but those missions are expected to nearly completely be under American command.

Laurel Miller, who was a top State Department official working on Afghanistan and Pakistan policy during the Obama and Trump administrations, said it was risky to change the military mission in Afghanistan without a peace plan in place.

The idea of scaling down to a small CT-only mission has long been discussed in the U.S. government, she said. But, she said, if you stop backing up Afghan forces in their main fight, you cant very well keep working on your narrower priorities in isolation with Afghanistan falling apart around you.

It is also possible that international funding support for the Afghan government could end up going to the Taliban under a power-sharing agreement. But American and European officials called it critically necessary to continue funding Afghan security forces.

The track record for American-supported governments after peace treaties or troop withdrawals is shaky at best.

American-trained South Vietnamese fell to Communist forces two years after the United States withdrew from the Vietnam War in 1973. Large portions of the Iraqi Army collapsed in the face of an Islamic State offensive in 2014, just three years after the withdrawal of the American military and its trainers, necessitating a return to Iraq by international forces.

Some officials believe continued funding for the Afghan military is more important than an enduring international troop presence for the survival of Afghanistans government.

As long as we continue to provide funding to the Afghan security forces in the field, I think the security forces would be very capable of keeping order in the country, particularly in a scenario where the Taliban has come in from the cold, Mr. Stavridis said.

Read more here:
Under Peace Plan, U.S. Military Would Exit Afghanistan Within ...