The piece is critical to supporting a wing on the commercial airliner.

WSJ: 9/11 Remains Sought in Debris Behind New York City Building

The second most stressful job (after commercial airliner pilot)?

FORBES: The Second Most Stressful Job?

It was at a flight school in Arizona, according to the United States, that Raissi had close ties with Hani Hanjour, believed to have piloted the commercial airliner that crashed into the Pentagon.

CNN: U.S. bids to extradite Algerian pilot

Thursday's incident is the first fatal crash of a commercial airliner in the United States since August 2006, when Comair Flight 5191 crashed while attempting to take off from the wrong runway near Lexington, Kentucky.

CNN: Search for answers begins in Buffalo plane crash

Including the Thai Airways crash, the world has seen 20 accidents involving the loss of a commercial airliner in 1998, a number similar to that for the previous two years, according to Airclaims, a London-based firm of aviation insurance loss-adjusters.

ECONOMIST: Asia��s fear of flying

Since Oct. 13, when a propeller plane crash in Papua New Guinea killed 28 passengers, nobody has died in an airliner, which is generally defined as a commercial, multi-engine airplane carrying 14 or more passengers.

WSJ: Airlines Count Down to Safest Year on Record