The training plan was for a continuity of government mission in which U.S. leaders need an emergency evacuation to safety in the event of a major attack.

There's still a lot we don't know and initial speculation from the media and the president about the causes of Wednesday's ...

Top US officials said a military helicopter was on a regular training mission when it collided with a civilian airliner over the Potomac River on Wednesday night. The scenario its pilots were ...