Rescue crews rushed into the Potomac River, just three miles from the White House, after a commercial jet carrying 64 people collided last night with an Army helicopter carrying three service members. By morning, officials determined that no one had survived.

The incident was the first fatal crash involving a major U.S. airline in more than 15 years. The night was clear, and both aircraft were following standard flight paths, officials said. But roughly a minute after the helicopter crew told air traffic control that it could see the jet, the two aircraft collided. We mapped out the flight paths.

Among the victims on the flight, a two-and-a-half-hour journey from Wichita, Kansas, were a group of friends returning from a duck hunting trip and more than a dozen figure skaters, including two world champions from Russia.

Emergency personnel pulled more than two dozen bodies from icy water, and federal transportation officials launched an investigation into the disaster.

An internal preliminary report, reviewed by The Times, found that staffing at the air traffic control tower was “not normal for the time of day and volume of traffic.” The controller who was handling helicopters was also instructing landing and departing planes, duties typically managed by two people.

Shortly before the crash, the jet’s pilots were asked to pivot their landing route from one runway to another. A webcam caught the moment of impact.