Maps and charts to explain what is known about the accident in Washington
The helicopter’s GPS signal shows that it had taken off shortly before the crash. Aircraft collisions accounted for 12% of all aviation accidents last year

A commercial airliner and a military helicopter collided Wednesday night near Ronald Reagan Washington National Airport, the closest airport to Washington, D.C. The passenger plane, which was flying from Wichita, Kansas, was carrying 64 people. The helicopter, which was on a training mission, had three people on board.