The wreckage of a military helicopter involved in a mid-air collision with a passenger jet that killed all 67 people on both aircraft was recovered Thursday from the Potomac River, federal officials said.

A regional jet departed Kansas and headed to one of the country’s most congested and complicated flight approaches, just south of the brightly illuminated marble monuments of Washington, DC. The journey ended as the deadliest US aviation disaster in nearly a quarter century.

Search teams scoured the Black Hawk helicopter wreckage after the Potomac River mid-air collision with a plane. A group of investigators conducted an inspection in the frigid waters where the military chopper crashed into a plane before plunging into the Potomac River.