been successfully launched from pad 39A. June 1 (Flight day 2) During the first full day in space, Ham and Nyberg completed a limited inspection of the shuttle's thermal protection system using the end effector camera of the shuttle's robotic arm. The crew also installed the centerline camera and extended the orbiter's docking system ring to prepare Discovery''' for arrival at the space station. June 2 (Flight day 3)Discovery docked with the space station at 18:03 UTC and the hatches opened at 19:36 UTC. Greg Chamitoff officially joined the Expedition 17 crew, replacing Garrett Reisman. June 3 (Flight day 4) Mike Fossum and Ron Garan completed a six-hour-forty-eight-minute spacewalk at 23:10 UTC. During the excursion, the pair retrieved the Orbiter Boom Sensor System, serviced and inspected components of a Solar Alpha Rotary Joint and prepared the JEM-PS component of the Kibō laboratory for installation. Karen Nyberg and Akihiko Hoshide, using the station's robotic arm, removed the JEM-PS from the shuttle's payload bay and latched it in place on the Harmony node, completing the task at 23:01 UTC. June 4 (Flight day 5) The hatch to the Kibō lab was opened at 21:05 UTC. The crew also repaired the malfunctioning ISS toilet. June 5 (Flight day 6) Fossum and Garan completed the second STS-124 spacewalk. The 7-hour, 11-minute excursion ended at 22:15 UTC. Prior to heading outside spacewalker Garan stated "Mike and I are getting ready to go out the door for our second spacewalk today. It's going to be a wonderful day." June 6 (Flight day 7) The crew moved the Kibō Logistics Module from Harmony to the Pressurized Module. June 7 (Flight day 8) Hoshide and Nyberg moved two of the six joints on the Japanese Kibō lab's robotic arm for the first time, maneuvering them very slightly with a series of commands. With the mission at its midpoint astronaut Karen Nyberg commented that "the week has gone way too fast." June 8 (Flight day 9) Fossum and Garan conducted the third and final spacewalk, replacing an empty nitrogen tank and collecting a sample of debris from the solar array. June 9 (Flight day 10)Kibōs robot arm was extended to its full 33 feet, with all six joints tested. The astronauts also opened the hatch to the Kibōs storage unit. June 10 (Flight day 11) The shuttle closed the hatch connecting it to the space station at 19:49 UTC.