1.   A sudden loss of pressure can be catastrophic, but even so the crew should have had enough time to don emergency masks.

2.   Dr. Jerry M. Linenger, an American astronaut on board, grabbed an emergency mask, but no oxygen came out.

3.   The chemicals were in canisters called oxygen generators, which are used to supply emergency masks with oxygen.

4.   The chemicals were in canisters called oxygen generators, used on some planes to supply emergency masks with oxygen.

5.   The oxygen generators are used on some planes to supply emergency masks with oxygen.

6.   The parts, called oxygen generators, are used to make oxygen for emergency masks through a chemical reaction that also creates much heat.

7.   ValuJet is not authorized to carry hazardous materials such as the chemicals stored in the full generators, which provide oxygen to emergency masks, as freight.

8.   When the chemicals are mixed by a tiny explosive charge that is detonated by a spring-loaded hammer, they make oxygen for emergency masks.

9.   After opening the hatch Sunday, the crews of Atlantis and Alpha installed fire extinguishers and emergency masks and lights in the laboratory.

10.   As a precaution, the crew has to stand by with extinguishers and emergency masks each time a canister is activated.