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CAPE CANAVERAL, Fla. – On Launch Pad 39A at NASA's Kennedy Space Center, space shuttle Endeavour roars into the night sky on the STS-126 mission. Blue cones of light, the shock or mach diamonds that are a formation of shock waves in the exhaust plume of an aerospace propulsion system can be seen beneath the nozzles of the main engines. Liftoff was on time at 7:55 p.m. EST. STS-126 is the 124th space shuttle flight and the 27th flight to the International Space Station. The mission will feature four spacewalks and work that will prepare the space station to house six crew members for long-duration missions. Photo credit: NASA/Rusty Backer-George Roberts