An August 2005 incident in which an Airbus A340 skidded off a runway, endangering the lives of more than 300 people on board, is investigated.

A passenger jet tries to make it to land when it runs into trouble over the Indian Ocean.

A smoke-filled DC-10 makes an emergency landing in Cincinnati and, 90 seconds later, bursts into flames.

The 1997 crash of Korean Air Flight 801, which occurred when the crew attempted an instrument landing during a heavy rain storm, is recalled.

Two deadly Boeing 737 crashes during the 1990s are investigated.

The investigation into a midair collision over Cerritos, Cal., leads to improvements in how planes are monitored.

The 1996 crash in Croatia of USAF IFO-21, an executive transport aircraft carrying Commerce Secretary Ron Brown and 34 others, is examined.

An examination of the crash over the Red Sea in January 2004.

The case of Helios Airways 737, in which a passenger flight circling Athens fails to respond to air-traffic controllers.