1.   Boom produced an emergency oxygen kit that kept Joe alive until he could be properly outfitted in town with a PBD, or Permanent Breathing Device.

2.   Airlines use them in their emergency oxygen systems, but the FAA banned passenger airlines from carrying them as freight after the Valujet crash.

3.   The airline hired SabreTech Corp. to overhaul the planes, a job that included the removal of emergency oxygen generators that had reached their service life limits.

4.   The canisters on Mir are similar to the equipment used to charge the emergency oxygen systems on airliners.

5.   The cannisters are part of the emergency oxygen system in the passenger compartment of many airplanes.

6.   The generators are used to produce oxygen for passenger emergency oxygen systems.

7.   They were saved by the emergency oxygen system.

8.   Devices that generate emergency oxygen on Boeing jetliners may not work because of airline maintenance mistakes, the Federal Aviation Administration has found.

9.   Emergency oxygen was available, but in the older-style plane it had to be activated manually by the crew.

10.   Hainzl rushed to an underground chamber where miners normally ate their meals because he knew the chamber had a heavy wooden table and emergency oxygen tanks.