Experts say the gunman’s brain tissue points to traumatic injury ‘likely’ caused by blasts in the line of duty; the Army disagrees, but is taking steps to limit exposure.

About 795,000 Americans will have a stroke this year — new research suggests that a common, healthy habit may reduce the risk of certain types of stroke.

A regional jet flown for American Airlines Group Inc. collided in a deadly midair crash with a military helicopter as it flew into Ronald Reagan Washington National Airport, prompting a ...

President Donald Trump, who made the deportation of migrants a central part of his campaign and presidency, said Wednesday ...