An American Airlines plane with 64 people on board collided with an Army helicopter over Washington, D.C., and crashed into the Potomac River.

Conditions of the Potomac River Saturday have improved as officials recover the remains of people who died in the collision.

The midair crash occurred before 9 p.m. local time when a Bombardier CRJ700 jet that had departed from Wichita, Kansas, collided with a Black Hawk helicopter.