The Black Hawk pilots who collided with an American Airlines plane last month may not have heard vital information given by air traffic control to fly behind the passenger jet seconds before the

The NTSB gave an update on its investigation into the Potomac River crash between an American Airlines jet and an Army helicopter in January.

The National Transportation Safety Board is examining "bad data" the crew of an Army Black Hawk helicopter may have relied upon prior to their deadly crash with a passenger jet outside Washington D.C.

The NTSB said Army Black Hawk crew may not have heard a message to "pass behind" the D.C.-bound passenger plane before the Jan. 29 midair crash over the Potomac River.

A Black Hawk helicopter crew may not have heard key instructions from air traffic control before it struck an American Airlines jet near Washington DC a fortnight ago, according to black box data.