Gregory Allen Feith is an American former Senior Air Safety Investigator with the National Transportation Safety Board (NTSB). He currently works as a consultant on aviation safety and security matters in the private sector, and as the aviation expert for NBC and MSNBC. He also serves as the technical advisor in a number of television programs such as Mayday, Seconds From Disaster, and Why Planes Crash while maintaining a busy speaking schedule.

Why Planes Crash was a documentary TV series based on aviation accidents and crashes. The series was created, named and produced by Caroline Sommers for NBC News. The series premiere on July 12, 2009, featured Captain Chesley "Sully" Sullenberger's ditching of U.S. Air Flight 1549 in the Hudson on January 15, 2009, popularly known as "Miracle on the Hudson." Three other ditchings were also featured in this episode: Ethiopian Airlines Flight 961, ALM Flight 980, and Pan Am Flight 6.