By David Shepardson WASHINGTON (Reuters) -Federal investigators have launched a probe after two flights aborted landings at Reagan Washington National Airport on Thursday because a U.S. Army Black Hawk helicopter too close.

The Black Hawk was trying to land at the Pentagon’s heliport, bringing it close to a pair of airliners, according to the Federal Aviation Administration.

The episode followed a fatal collision between a military helicopter and a commercial jet in January, and prompted concern and outrage among officials.