U.S. military troops and other defense personnel at sensitive bases or certain high-risk war zone areas won't be allowed to use features on fitness trackers or cellphone applications that can reveal their location, according to a new Pentagon order.

U.S. golfing legend Arnold Palmer has died in Pittsburgh, the United States Golfing Association confirmed on Twitter Sunday evening.

Army teams and emergency crews searched early Friday for four Fort Hood soldiers missing after a truck overturned in a fast-flowing flooded creek during a training exercise at the sprawling Army base in Central Texas.

U.S. Army officials say four people have died in a helicopter crash at Fort Hood.