21.   The air lock allows American astronauts to use their own suits and haul larger pieces of equipment on spacewalks without having to rely on a shuttle.

22.   The astronauts were also using new Russian space suits designed for longer missions.

23.   The astronauts will use the shuttle robot arm to capture the Russian piece and attach it to Unity.

24.   The bracket is supposed to hold up a water pipe on the outside of the walkway used by astronauts to board the shuttle.

25.   The bracket is supposed to hold up a water pipe on the outside of the walkway room used by astronauts to board the shuttle.

26.   The next shuttle flight will be next month, when Atlantis lifts off to deliver a pressure compartment to the space station that spacewalking astronauts will use.

27.   The new air lock will enable astronauts to use U.S. spacesuits at any time.

28.   To survive, the astronauts used the cold and cramped lunar module as a lifeboat for four days.

29.   Walz said the keyboard has a learn-to-play function, so even nonmusical astronauts can use it.

30.   Astronauts were using a powerful radar to survey an Indonesian volcano.