The investigation into a midair collision between a jetliner and U.S. Army helicopter just outside of the U.S. Capital has begun. There were no survivors. The American Airlines jet had 64 passengers and crew onboard. The Blackhawk helicopter had a crew of three. The two aircraft collided as the passenger jet was on its final approach to Reagan National Airport and crashed into the Potomac River. We spoke with William Angelley, an aviation crash attorney and former Navy pilot about the investigation.