CAPE CANAVERAL, Fla. – The STS-127 crew members arrive at NASA's Kennedy Space Center in Florida to prepare for space shuttle Endeavour's July 11 launch on the 29th assembly flight to the International Space Station. Exiting the aircraft first is Commander Mark Polansky, who will be making his third shuttle flight. This will be the third launch attempt due to the leak of hydrogen gas at the Ground Umbilical Carrier Plate during tanking on two previous attempts, June 13 and June 17. The STS-127 mission is the final of three flights dedicated to the assembly of the Japan Aerospace Exploration Agency's Kibo laboratory complex. Endeavour will deliver the Japanese Experiment Module's Exposed Facility, or JEM-EF, and the Experiment Logistics Module-Exposed Section, or ELM-ES. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – – The STS-127 crew members arrive at NASA's Kennedy Space Center in Florida to prepare for space shuttle Endeavour's July 11 launch on the 29th assembly flight to the International Space Station. Leading the way, Commander Mark Polansky is greeted by the STS-127 Launch Director Pete Nickolenko. Behind Polansky is Pilot Doug Hurley. Polansky will be making his third shuttle flight and Hurley his first. This will be the third launch attempt due to the leak of hydrogen gas at the Ground Umbilical Carrier Plate during tanking on two previous attempts, June 13 and June 17. The STS-127 mission is the final of three flights dedicated to the assembly of the Japan Aerospace Exploration Agency's Kibo laboratory complex. Endeavour will deliver the Japanese Experiment Module's Exposed Facility, or JEM-EF, and the Experiment Logistics Module-Exposed Section, or ELM-ES. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – After arriving at NASA's Kennedy Space Center in Florida to prepare for space shuttle Endeavour's July 11 launch on the 29th assembly flight to the International Space Station, Commander Mark Polansky greets the media. Polansky commented that the crew was eager and ready to get to work. This will be the third launch attempt due to the leak of hydrogen gas at the Ground Umbilical Carrier Plate during tanking on two previous attempts, June 13 and June 17. The STS-127 mission is the final of three flights dedicated to the assembly of the Japan Aerospace Exploration Agency's Kibo laboratory complex. Endeavour will deliver the Japanese Experiment Module's Exposed Facility, or JEM-EF, and the Experiment Logistics Module-Exposed Section, or ELM-ES. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – NASA's Shuttle Training Aircraft lands at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida with STS-127 crew members aboard. The crew is returning to Kennedy to prepare for space shuttle Endeavour's July 11 launch on the 29th assembly flight to the International Space Station. This will be the third launch attempt due to the leak of hydrogen gas at the Ground Umbilical Carrier Plate during tanking on two previous attempts, June 13 and June 17. The STS-127 mission is the final of three flights dedicated to the assembly of the Japan Aerospace Exploration Agency's Kibo laboratory complex. Endeavour will deliver the Japanese Experiment Module's Exposed Facility, or JEM-EF, and the Experiment Logistics Module-Exposed Section, or ELM-ES. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – After arriving at NASA's Kennedy Space Center in Florida to prepare for space shuttle Endeavour's July 11 launch on the 29th assembly flight to the International Space Station, the STS-127 crew members line up to greet the media. From left are Mission Specialists Tim Kopra, Tom Marshburn and Christopher Cassidy, Commander Mark Polansky, Mission Specialists Dave Wolf and Julie Payette, and Pilot Doug Hurley. Kopra is making his first shuttle flight and will remain on the International Space Station as the Expedition 20 flight engineer. Payette is with the Canadian Space Agency. This will be the third launch attempt due to the leak of hydrogen gas at the Ground Umbilical Carrier Plate during tanking on two previous attempts, June 13 and June 17. The STS-127 mission is the final of three flights dedicated to the assembly of the Japan Aerospace Exploration Agency's Kibo laboratory complex. Endeavour will deliver the Japanese Experiment Module's Exposed Facility, or JEM-EF, and the Experiment Logistics Module-Exposed Section, or ELM-ES. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – After arriving at NASA's Kennedy Space Center in Florida to prepare for space shuttle Endeavour's July 11 launch on the 29th assembly flight to the International Space Station, the STS-127 crew members pose for a final photo before leaving the Shuttle Landing Facility. From left are Mission Specialists Tim Kopra, Tom Marshburn and Christopher Cassidy, Commander Mark Polansky, Mission Specialists Dave Wolf and Julie Payette, and Pilot Doug Hurley. Kopra is making his first shuttle flight and will remain on the International Space Station as the Expedition 20 flight engineer. Payette is with the Canadian Space Agency. This will be the third launch attempt due to the leak of hydrogen gas at the Ground Umbilical Carrier Plate during tanking on two previous attempts, June 13 and June 17. The STS-127 mission is the final of three flights dedicated to the assembly of the Japan Aerospace Exploration Agency's Kibo laboratory complex. Endeavour will deliver the Japanese Experiment Module's Exposed Facility, or JEM-EF, and the Experiment Logistics Module-Exposed Section, or ELM-ES. Photo credit: NASA/Kim Shiflett