No one is expected to have survived a collision between an American Airlines plane and an Army helicopter Wednesday night near Ronald Reagan Washington National Airport, officials said.WHAT WE KNOW SO FAR» American Eagle Flight 5342 (Wichita,

No survivors are expected to be found after an American Airlines jet carrying 64 people collided midair with a military helicopter near Washington, D.C., in what would be the deadliest U.S. aviation disaster in more than two decades.