The Senate Commerce Committee may subpoena the Army for a report that explains why it repeatedly failed to utilize a safety system called ADS-B on helicopter flights near Ronald Reagan Washington National Airport, its chair, Sen. Ted Cruz (R-Texas), said on April 2.
When an Army Black Hawk helicopter on a routine training mission collided midair with an American Airlines regional jet descending for a landing on Jan. 29, killing 67 people, it did not have that system operating.