1.   After the fire investigators tested a similar oxygen canister to determine whether it could generate enough heat to cause the fire.

2.   America West was cited for two violations involving the oxygen canisters, according to an FAA civil penalty letter obtained by The Republic.

3.   Aviation investigators have said the oxygen canisters may have caught fire in the cargo hold and caused the crash.

4.   Based on the notes and the recovered bottle, expedition leaders concluded that Mallory and Irvine may have left Camp VI with three oxygen canisters apiece.

5.   All three tires in the cargo hold were recovered, but so far, only two oxygen generator canisters have been found.

6.   Early on, it was clear the focus of the hearings would be the oxygen canisters.

7.   Emphysema patients have come to the clinic wheeling their oxygen canisters.

8.   In February, an oxygen canister caught fire, filling the station with smoke.

9.   In recent months, the Mir has endured a fire, the failure of its oxygen canisters and a leak in its cooling system as well as the collision.