Astronauts Take 1st Spacewalk of Shuttle Mission

A pair of spacewalking astronauts disconnected an old empty ammonia tank outside the International Space Station on Friday and got a new one ready to put in its place. In the first of three spacewalks needed to complete the job, Clayton Anderson had no problem taking apart the ammonia lines on the old tank. But he needed a pry bar to remove the new tank out of space shuttle Discovery's payload bay. The tank got hung up on a bolt. More

(Source: ABC News - Apr 10)