The Boeing Delta II launch vehicle for NASA’s Swift spacecraft is poised for launch at the scheduled liftoff time of 12:16:00.611 p.m. EST from Launch Pad 17-A on Cape Canaveral Air Force Station, Fla. Swift is a first-of-its-kind multi-wavelength observatory dedicated to the study of gamma-ray burst science. Its three instruments will work together to observe GRBs and afterglows in the gamma ray, X-ray, ultraviolet and optical wavebands.