12 of the devices were found in Stephen Paddock's hotel room. The ATF says bump stocks, although used for the purpose of "simulating automatic fire," are legal under current federal law.
More details are emerging about Stephen Paddock, who perpetrated the massacre in Las Vegas. The reclusive professional gambler had few friends and made little impression on his neighbors.
Abortion providers are far away for many women in the U.S., a report from the Guttmacher Institute finds. That's especially true for women in South Dakota and other states in the Upper Midwest.
President Trump and first lady Melania Trump visited Puerto Rico, where they were briefed on the status of the relief effort and met with residents impacted by Hurricane Maria.
For centuries, scientists thought the human brain had no direct connection to the body's immune system. Now researchers seem to have found one, and say it may offer clues to multiple sclerosis, too.
For a week, black NFL players have been under an even brighter spotlight than on any given Sunday and while some families are turning away from the game, others are watching closely.
The sharp divides in the country over gun laws have been reflected in the largely binary responses from politicians from both major parties after the massacre in Las Vegas.