Astronauts Scott Parazynski and Doug Wheelock, after waiting out a routine ammonia decontamination procedure, repressurized the space station's airlock today to officially close out a successful six-hour 14-minute spacewalk. A half hour earlier, at 11:38 a.m., the new 31,500-pound Harmony module was attached to its temporary home on the left side of the central Unity module to accomplish one of the major objectives of the shuttle Discovery's mission.

"Good job on the (Harmony installation), it's awesome," one of the spacewalkers called from the airlock.

"Yeah, I sat around and made lunch for everybody and watched them just totally do a fantastic job," commander Pam Melroy said.

"It was so cool. We saw it hanging out there. ... Pambo, bringing harmony!" he said, referring to Melroy's mission nickname.

"Well, I don't know that anybody's ever told our crew that we bring harmony with us, but we sure bring fun," Melroy said.

"Agreed."

Today's spacewalk, the first of five planned for Discovery's mission, began at 6:02 a.m. and ended at 12:16 p.m., about 15 minutes ahead of schedule. The astronauts entered the airlock early to allow time for any trace amounts of ammonia ice crystals on either of their spacesuits to outgas and dissipate. The procedure, carried out as a precaution, was ordered after Parazynski disconnected four ammonia coolant lines leading to the stowed P6 solar array truss segment and reported seeing a few ice crystals.

There were no visible signs of contamination on his suit, but the decontamination procedure is mandatory in such cases. While they waited, station astronaut Dan Tani, who worked with shuttle flight engineer Stephanie Wilson to install Harmony with the lab's robot arm, provided an update.

"Just to let you know, we just completed the ungrapple procedure," Tani said. "It's been a long robotics day and we're greatly indebted to our fantastic team of robotics trainers and console operators ... and all the folks who got us here and helped us and made this a success."

"Well, everybody appreciates your work, Dan, and thank you guys," astronaut Kevin Ford said from space station control in Houston. "Looking at where you're at in the timeline, you guys ended up about an hour and a half ahead or so. We appreciate you working right through lunch and getting it all done."

Additional coverage for subscribers:
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VIDEO: NARRATED ANIMATION OF SHUTTLE PAYLOAD BAY PLAY
VIDEO: HARMONY'S PRE-LAUNCH PREPS AT THE CAPE PLAY
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VIDEO: NARRATED PREVIEW OF THE DOCKING PLAY

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VIDEO: WEDNESDAY'S MISSION STATUS BRIEFING PLAY
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VIDEO: THE FLIGHT DAY 1 HIGHLIGHTS MOVIE PLAY
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VIDEO: DISCOVERY'S LAUNCH AS SEEN LIVE PLAY
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VIDEO: LAUNCH REPLAY: PLAYALINDA WIDESCREEN PLAY
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VIDEO: A LOOK BACK AT SHUTTLE DISCOVERY'S HISTORY PLAY
VIDEO: PAD 39A'S ROTATING GANTRY MOVED BACK PLAY
VIDEO: INTERVIEW CLIPS WITH THE ASTRONAUTS PLAY
VIDEO: MONDAY MORNING'S STATUS BRIEFING PLAY
VIDEO: PRE-LAUNCH NEWS CONFERENCE PLAY
VIDEO: SUNDAY COUNTDOWN STATUS BRIEFING PLAY
VIDEO: SATURDAY COUNTDOWN STATUS BRIEFING PLAY
VIDEO: WATCH THE CREW'S ARRIVAL FOR LAUNCH PLAY
VIDEO: NEWS CONFERENCE AFTER FLIGHT READINESS REVIEW PLAY
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VIDEO: DISCOVERY MOVED TO THE VEHICLE ASSEMBLY BUILDING PLAY
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