Sixty-seven people died in a collision between a Bombardier CRJ700 regional jet operated by PSA Airlines and a military Black Hawk helicopter.

Following the fatal midair collision in Washington, D.C. between a commercial passenger jet and an Army helicopter, Families of Flight 3407 lend their hand in support of the families of the victims of Wednesday’s tragedy.

A look at the frequency of runway incursions in the United States and the preventative measures taken by the FAA to avoid collisions.

Wednesday’s fatal crash of a civilian plane and military helicopter at Reagan National Airport may reflect rising stresses on air-safety systems.

The deadly crash between an American Airlines flight and a Black Hawk helicopter has former officials during Flight 3407 reflecting on the response.

Sixty-seven people died in a collision between a Bombardier CRJ700 regional jet operated by PSA Airlines and a military Black Hawk helicopter.

An Army Black Hawk helicopter collided with a regional jet near Ronald Reagan Washington National Airport on Wednesday evening, U.S. officials confirmed to ABC News.

An American Airlines regional jet went down in the Potomac River near Washington, D.C.'s Ronald Reagan Washington National Airport after colliding with a U.S. Army Black Hawk helicopter on Wednesday night, with no survivors expected.

President Trump at moments of national tragedy has always been more comfortable finding fault than providing comfort or expressing empathy.

Wednesday's crash involving an American Airlines flight and Black Hawk helicopter marked the first commercial crash on U.S. soil in more than 15 years.

Video footage of the incident shows the aircraft flying at a low altitude, before an explosion happened at the moment of impact. The National Transportation Safety Board is investigating.