Victims' families gathered near the site where a plane and copter collided and fell into the Potomac River. 'They are all ...
Data from air traffic control radar showed the military chopper was flying at 300 feet on the air traffic control display at ...
This data point is one of several key mysteries investigators are exploring as they seek to explain what caused the nation's ...
The wreckage from both the plane and the helicopter will be taken to a hangar to be examined as part of the investigation ...