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Almost 600 plant species have been wiped from the planet in the past 250 years, more than twice the number of bird, mammal and amphibian species that have met the same fate, according to a new study.The 215

A migrant shelter in Tornillo, Texas that's housed thousands of children may close next month.A tent-like facility in Texas that houses unaccompanied migrant children may close next month after they are all released to parents or sponsors in the US. That's according to an official who spoke with several news outlets, including CNN and CBS News.The migrant shelter is located near the Tornillo-Guadalupe Port of Entry and operated by BCFS, a nonprofit that operates health and human services programs. The shelter opened this past summer with a capacity of about 300 people. Now, it reportedly houses between 2,400 to 2,800 children. The official told news outlets the facility will no longer accept children and will close after the last child is released to either a sponsor or another facility run by the Office of Refugee Resettlement. The federal government's contract with BCFS will expire on December 31st, and the source says the non-profit does not plan to extend it.An exact closing date for the facility has not yet been announced. Additional reporting from Scripps 1121

A subtle design feature of the AR-15 rifle has raised a technical legal question that is derailing cases against people who are charged with illegally buying and selling the gun’s parts or building the weapon.At issue is whether a key piece of one of America’s most popular firearms meets the definition of a gun that prosecutors have long relied on.For decades, the federal government has treated a mechanism called the lower receiver as the essential piece of the semiautomatic rifle, which has been used in some of the nation’s deadliest mass shootings. Prosecutors regularly bring charges based on that specific part.But some defense attorneys have recently argued that the part alone does not meet the definition in the law. Federal law enforcement officials, who have long been concerned about the discrepancy, are increasingly worried that it could hinder some criminal prosecutions and undermine firearms regulations nationwide.“Now the cat is out of the bag, so I think you’ll see more of this going on,” said Stephen Halbrook, an attorney who has written books on gun law and history. “Basically, the government has gotten away with this for a long time.”Cases involving lower receivers represent a small fraction of the thousands of federal gun charges filed each year. But the loophole has allowed some people accused of illegally selling or possessing the parts, including convicted felons, to escape prosecution. The issue also complicates efforts to address so-called ghost guns, which are largely untraceable because they are assembled from parts.Since 2016, at least five defendants have challenged the government and succeeded in getting some charges dropped, avoiding prison or seeing their cases dismissed entirely. Three judges have rejected the government’s interpretation of the law, despite dire warnings from prosecutors.Federal 1866

A newly obtained document shows President Donald Trump signed a letter of intent to move forward with negotiations to build a Trump Tower in Russia, despite his attorney Rudy Giuliani claiming on Sunday the document was never signed.CNN's Chris Cuomo 262

A night of excess at a Pittsburgh apartment ended with three people dead, four people hospitalized and a police department warning how quickly drugs can kill.Authorities responded to a report of an unconscious man in an apartment complex elevator around 2 a.m. Sunday. The man was pronounced dead at the scene, Pittsburgh Director of Public Safety Wendell Hissrich said.Shortly later, paramedics responded to another man a few blocks away, outside, who was "somewhat conscious" and had symptoms similar to those of the first man. He was taken to a nearby hospital, Hissrich said.Police traced both men back to an apartment on the city's south side. There, they found five other people who also apparently overdosed.Hissrich said he believed the victims were men between about 30 and 50 years old."The victims -- including three people who died and four who remain hospitalized -- appear to have been at the same venue together, and then to have gone to a second location at a private residence where they apparently overdosed on drugs," 1049