Investigators searching for wreckage from last week’s deadly midair collision between a US military Black Hawk helicopter and an American Airlines plane near Washington, DC, conducted an overnight scan of the Potomac River where the aircraft fell using advanced imaging technology to map the riverbed and locate debris.

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.