Video shows a California woman coming face-to-face with a mountain lion during a hike. NBC News' Marissa Parra has more on ...

There are new concerns over hyperbaric chambers after an Arizona physical therapist was killed by a "flash fire" while inside ...

Live updates and the latest news as President Donald Trump and first lady Melania Trump tour the Texas flood devastation and ...

Violent clashes erupted when protestors tried to block ICE agents from serving warrants during immigration enforcement ...