The source of the problem that forced the Boeing 737-300 used on the Southwest Airlines flight 812 from Phoenix to Sacramento to make an emergency landing on April 1st, following a five-foot rent appearing in the upper-fuselage skin, has flummoxed engineers and safety officials alike.

ECONOMIST: Aircraft fatigue

On the flight to Phoenix I sat next to Vivek Ranadive, the founder, chairman and CEO of Tibco Software.

FORBES: Super Week--Then The Worst

All those on board the Super Puma EC 225 were rescued safely after it ditched during a flight from Aberdeen to the West Phoenix rig, west of Shetland.

BBC: Restriction imposed on Super Puma helicopter