WASHINGTON (AP) — Military troops and other defense personnel at sensitive bases or certain high-risk warzone areas won't be allowed to use fitness-tracker or cellphone applications that can reveal their location, according to a new Pentagon order.

The memo, obtained by The Associated Press, stops short of banning the fitness trackers or other electronic devices, which are often linked to cellphone applications or smart watches and can provide the users' GPS and exercise details to social media. It says the applications on personal or government-issued devices present a "significant risk" to m...