WASHINGTON, May 5 (Reuters) -

The U.S. Army is pausing helicopter training flights around

the Pentagon pending a review into two passenger airline flights

that were forced to abort landings at Reagan Washington National

Airport on Thursday because of a nearby Black Hawk helicopter.

The Army's 12th Aviation Battalion has paused training

flights in and around Pentagon while they determine what

happened during Thursday's flight, a U.S. official told Reuters

Monday. The battalion had recently begun gradually resuming

flights after the Jan. 29 mid-air collision of an Army Black

Hawk on a training mission and an American Airlines ( AAL ) regional jet

near Reagan killed 67 people.