WATCH: Helicopter crew in DC collision ... near Washington D.C.’s Ronald Reagan National Airport might not have heard instructions from the air traffic controller to pass behind the plane ...

WASHINGTON -- Acting ... Helicopters like the one that crashed on Jan. 29 are now required to broadcast their position using ADS-B Out technology. RELATED: DC plane crash: NTSB calls for immediate ...

Testifying for the first time in front of the Senate Subcommittee on Aviation, acting Federal Aviation Administrator Chris Rocheleau admitted that "something was missed." ...