An American Airlines jet and an Army helicopter collided over Washington, D.C., Wednesday night. All 67 people aboard the aircraft are presumed dead.

The Black Hawk helicopter that crashed into an American Airlines flight was alerted to the plane’s presence by air control twice, according to the reports.

Two days after an American Airlines flight crashed in Washington, D.C., an air ambulance carrying six passengers—including a pediatric patient—crashed down in Northeast Philadelphia.