US authorities said it was not yet clear why a regional jet and a US Army helicopter collided at a Washington airport, killing 67 people in the deadliest U.S. air disaster in more than 20 years.

Get all the news you need in your inbox each morning. Federal aviation investigators vowed earlier in the day ...

An eyewitness to the Washington plane disaster has described seeing the plane at a 90 degree-angle seconds before the crash.

US figure skaters were among the casualties of the mid-air accident that killed 67 people. Russian former world champions ...

Fresh from recovering the so-called black boxes from the American Airlines plane that crashed into the Potomac River after ...

None are believed to have survived the Wednesday night collision, which caused both aircraft to plunge into the frigid ...

Human-monitored Air Traffic Control, while effective in many ways, is increasingly becoming a bottleneck in ensuring safe and ...