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. Sixty-four people were on board the plane, which departed from Wichita, Kansas. Three soldiers were on the helicopter.

"The position configuration was not normal for the time of day and volume of traffic," according to the report obtained Thursday by The Associated Press. One air traffic controller was doing work normally assigned to two people in the tower at Ronald Reagan National Airport when the collision happened,