11.   One cosmonaut will have to don a spacesuit to venture into the sealed Spektr module, which was depressurized during the collision.

12.   Russian flight controllers say the two cosmonauts have to go inside the sealed off Spektr module to make repairs that can replenish the reduced energy supply.

13.   Russian and NASA officials said the cosmonauts would have to thoroughly train for the walk.

14.   Several Russian cosmonauts already have in-space acting experience, appearing from the Mir in commercials for Pepsi, Omega watches and Israeli milk.

15.   Six years later, aboard Mir, two spacewalking cosmonauts had to go out to repair insulation on their docked Soyuz capsule.

16.   The cosmonauts also had to complete some work they failed to finish last Friday in a difficult, six-hour spacewalk that ran nearly an hour over schedule.

17.   The cosmonauts have had an unusually hectic schedule, prompting ground controllers and doctors to insist repeatedly that they get enough rest between missions.

18.   The cosmonauts have to regularly wash the interior walls with moistened cloths, otherwise the walls get grimy, he said.

19.   The cosmonauts also had to contend with a shutdown of the main computer on Mir, which in turn failed to turn on the station lights.

20.   The cosmonauts first had to clear away debris hampering their passage through the darkened module.