The evidence is anecdotal, but psychologists and flight attendants say they’ve seen and heard increased worries about flying.

An experimental MX Aircraft MXS crashed Thursday while the pilot was attempting to land at the Langley Air Force Base, the Federal Aviation Administration said.

Flights take off over the crash site of an American Airlines plane and an Army Black Hawk helicopter that collided and crashed into the Potomac River. (Carol Guzy/Zuma Press) American Airlines ...