1.   With NASA and the European space program paying hundreds of millions of dollars to station astronauts on the Mir, there is a lot riding on the repair effort.

2.   Early Tuesday, station astronaut Jim Voss replaced the leaky valve with a temporary cap.

3.   NASA also had planned to build a rescue vehicle so up to seven station astronauts could get home quickly in an emergency.

4.   Station astronaut Jim Voss replaced the leaky valve with a spare.

5.   That chamber will allow station astronauts to perform spacewalks without the aid of a shuttle.

6.   Station astronaut Jim Voss and Atlantis Commander Steven Lindsey replaced the leaky valve with a spare.

7.   That chamber will allow station astronauts to conduct spacewalks without the aid of a shuttle.

8.   The air lock, a two-room pressure chamber, will enable station astronauts to conduct spacewalks in U.S.-made spacesuits without aid of a shuttle.

9.   The chamber will enable station astronauts to conduct spacewalks without aid of a space shuttle.

10.   The new arm will install a pressure chamber to Alpha in June that will allow station astronauts to conduct spacewalks without the aid of a shuttle.