21.   The station crew had been periodically igniting lithium perchlorate candles to produce breathing oxygen.

22.   The station crew ignited lithium perchlorate candles to generate oxygen, Campion said.

23.   The station crew must dim lights and turn off all non-essential electronic equipment until the guidance lock can be restored.

24.   The station crew re-entered the docked Progress capsule after an attempt to release it earlier in the day failed.

25.   The station crew, about one quarter through its four-month stay, is expected to open hatches and greet the shuttle visitors on Friday.

26.   The station crew also replaced an igniter that triggers the combustion of lithium perchlorate candles, the backup system.

27.   The station crew re-entered the docked Progress capsule late Monday after an attempt to release it earlier in the day failed.

28.   The task force suggestions include possibly cutting back the number of shuttle flights to the outpost and keeping the station crew at three rather than the seven originally envisioned.

29.   Though not facing a long term health hazard, the station crew lost about three hours of sleep.

30.   Though the escape protocol calls for an orderly departure, the station crew could retreat quickly if necessary, undock and then don pressure suits for re-entry.