Blue mach diamonds appear beneath the engines as it hurtles into the sky on mission STS-118.

Blue mach diamonds appear beneath the main engines on Space Shuttle Endeavour as it hurtles into the sky on mission STS-118. The 22nd shuttle flight to the International Space Station, the mission will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. Liftoff of Endeavour was on time at 6:36 p.m. EDT. Photo credit: NASA/Jerry Cannon, Mike Kerley