Amid increased concerns about aviation safety, here's how many air traffic controllers there are in the U.S., and how the hiring process works.

An American Airlines regional jet went down in the Potomac River near Ronald Reagan Washington National Airport.

Hearing that just one air traffic controller was monitoring both planes and helicopters has left many to wonder how common such a situation is. Burke, 81, has filed a petition with the Office of the Pardon Attorney at the U.