The May 16, 2014 launch of a United Launch Alliance Delta 4 rocket carrying the GPS 2F-6 navigation satellite. Video: Stephen Clark/Spaceflight Now
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Video: Liftoff of Delta 4 rocket and WGS 9 satellite
The United Launch Alliance Delta 4 rocket, standing 217 feet tall and weighing 900,000 pounds, unleashes 1.8 million pounds of thrust from its main engine and four side-mounted boosters at 8:18 p.m. EDT Saturday (0018 GMT Sunday) to launch the ninth Wideband Global SATCOM satellite for U.S. military and allied communications.