Space shuttle Discovery has landed at the Kennedy Space Center after transporting it’s seven astronauts more than six million miles. The crew claimed a successful mission during a post flight press conference, even after facing the challenge of a stuck pressure valve on a replacement tank.

Discovery returned from mission STS-131 to the International Space Station, where the crew delivered more than seven tons of equipment and supplies. During the ten day mission, astronauts Rick Mastracchio and Clayton Anderson executed three spacewalks, installed a 1,700-pound ammonia tank assembly on the station’s exterior, replaced a rate gyro assembly, and retrieved a Japanese experiment and two debris shields.

Source: NASA Space Shuttle Missions