A deadly midair collision between an American Airlines jet and an Army helicopter near the nation’s capital is bringing renewed focus on the federal agency charged with investigating aviation disaster

National Transportation Safety Board Chairwoman Jennifer Hommendy described the investigation into the crash Wednesday night as an “all-hands-on-deck event” for the agency during a news conference Thursday in which she appeared with members of the board and a senior investigator overseeing the probe.

No one is believed to have survived the collision of American Airlines passenger aeroplane and a US Army helicopter near Washington, according to fire and emergency services chief John Donnelly

More than a week after the horrific helicopter-plane collision near Washington, salvage crews have recovered most of the wreckage.