CAPE CANAVERAL, Fla. – Astronaut Lee Archambault, the commander for space shuttle Discovery's STS-119 mission, arrives at NASA's Kennedy Space Center in Florida to prepare for launch. STS-119 is the 125th space shuttle flight and the 28th flight to the International Space Station. Discovery and its crew will deliver the final set of large power-generating solar array wings and integrated truss structure, S6, to the space station. The mission includes four spacewalks. Launch is scheduled for March 11 at 9:20 p.m. EDT. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Astronaut John Phillips, a mission specialist for space shuttle Discovery's STS-119 mission, arrives at NASA's Kennedy Space Center in Florida to prepare for launch. STS-119 is the 125th space shuttle flight and the 28th flight to the International Space Station. Discovery and its crew will deliver the final set of large power-generating solar array wings and integrated truss structure, S6, to the space station. The mission includes four spacewalks. Launch is scheduled for March 11 at 9:20 p.m. EDT. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Astronaut Tony Antonelli, pilot for space shuttle Discovery's STS-119 mission, arrives at NASA's Kennedy Space Center in Florida to prepare for launch. STS-119 is the 125th space shuttle flight and the 28th flight to the International Space Station. Discovery and its crew will deliver the final set of large power-generating solar array wings and integrated truss structure, S6, to the space station. The mission includes four spacewalks. Launch is scheduled for March 11 at 9:20 p.m. EDT. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – After addressing the news media on hand to welcome them, the crew members for space shuttle Discovery's STS-119 mission leave the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. The crew arrived at Kennedy this afternoon to make final preparations for launch. From left are Mission Specialists Koichi Wakata of the Japan Aerospace Exploration Agency, John Phillips, Richard Arnold, Steve Swanson and Joseph Acaba; Pilot Tony Antonelli; and Commander Lee Archambault. STS-119 is the 125th space shuttle flight and the 28th flight to the International Space Station. Discovery and its crew will deliver the final set of large power-generating solar array wings and integrated truss structure, S6, to the space station. The mission includes four spacewalks. Launch is scheduled for March 11 at 9:20 p.m. EDT. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Astronaut Richard Arnold, a mission specialist for space shuttle Discovery's STS-119 mission, arrives at NASA's Kennedy Space Center in Florida to prepare for launch. STS-119 is the 125th space shuttle flight and the 28th flight to the International Space Station. Discovery and its crew will deliver the final set of large power-generating solar array wings and integrated truss structure, S6, to the space station. The mission includes four spacewalks. Launch is scheduled for March 11 at 9:20 p.m. EDT. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Astronaut Steve Swanson, a mission specialist for space shuttle Discovery's STS-119 mission, arrives at NASA's Kennedy Space Center in Florida to prepare for launch. STS-119 is the 125th space shuttle flight and the 28th flight to the International Space Station. Discovery and its crew will deliver the final set of large power-generating solar array wings and integrated truss structure, S6, to the space station. The mission includes four spacewalks. Launch is scheduled for March 11 at 9:20 p.m. EDT. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – The crew members for space shuttle Discovery's STS-119 mission address the news media on hand to welcome them upon their arrival at NASA's Kennedy Space Center in Florida to prepare for launch. From left are Commander Lee Archambault, at the microphone; Pilot Tony Antonelli; and Mission Specialists Joseph Acaba, Steve Swanson, Richard Arnold, John Phillips and Koichi Wakata of the Japan Aerospace Exploration Agency. STS-119 is the 125th space shuttle flight and the 28th flight to the International Space Station. Discovery and its crew will deliver the final set of large power-generating solar array wings and integrated truss structure, S6, to the space station. The mission includes four spacewalks. Launch is scheduled for March 11 at 9:20 p.m. EDT. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – The first crew members for space shuttle Discovery's STS-119 mission arrive at NASA's Kennedy Space Center in Florida to prepare for launch. From left, Mission Specialist John Phillips is greeted by Mike Wetmore, associate director for Engineering and Technical Operations at Kennedy, and Mike Leinbach, shuttle launch director. STS-119 is the 125th space shuttle flight and the 28th flight to the International Space Station. Discovery and its crew will deliver the final set of large power-generating solar array wings and integrated truss structure, S6, to the space station. The mission includes four spacewalks. Launch is scheduled for March 11 at 9:20 p.m. EDT. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – The first crew members for space shuttle Discovery's STS-119 mission arrive at NASA's Kennedy Space Center in Florida to prepare for launch. From left, Commander Lee Archambault and Mission Specialist John Phillips are greeted by Mike Leinbach, shuttle launch director, and Mike Wetmore, associate director for Engineering and Technical Operations at Kennedy. STS-119 is the 125th space shuttle flight and the 28th flight to the International Space Station. Discovery and its crew will deliver the final set of large power-generating solar array wings and integrated truss structure, S6, to the space station. The mission includes four spacewalks. Launch is scheduled for March 11 at 9:20 p.m. EDT. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – The first crew members for space shuttle Discovery's STS-119 mission arrive at NASA's Kennedy Space Center in Florida to prepare for launch. From left, Mission Specialist Joseph Acaba is greeted by Mike Leinbach, shuttle launch director. STS-119 is the 125th space shuttle flight and the 28th flight to the International Space Station. Discovery and its crew will deliver the final set of large power-generating solar array wings and integrated truss structure, S6, to the space station. The mission includes four spacewalks. Launch is scheduled for March 11 at 9:20 p.m. EDT. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – The crew members for space shuttle Discovery's STS-119 mission pose for a group portrait at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. The crew arrived at Kennedy this afternoon to make final preparations for launch. From left are Mission Specialists Koichi Wakata of the Japan Aerospace Exploration Agency, John Phillips, Richard Arnold, Steve Swanson and Joseph Acaba; Pilot Tony Antonelli; and Commander Lee Archambault. STS-119 is the 125th space shuttle flight and the 28th flight to the International Space Station. Discovery and its crew will deliver the final set of large power-generating solar array wings and integrated truss structure, S6, to the space station. The mission includes four spacewalks. Launch is scheduled for March 11 at 9:20 p.m. EDT. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – The crew members for space shuttle Discovery's STS-119 mission arrive at NASA's Kennedy Space Center in Florida to prepare for launch. From left, Mission Specialist Koichi Wakata is greeted by Mike Wetmore, the associate director for Engineering and Technical Operations at Kennedy. STS-119 is the 125th space shuttle flight and the 28th flight to the International Space Station. Discovery and its crew will deliver the final set of large power-generating solar array wings and integrated truss structure, S6, to the space station. The mission includes four spacewalks. Launch is scheduled for March 11 at 9:20 p.m. EDT. Photo credit: NASA/Kim Shiflett