Photos: X-37B gallery archive

United Launch Alliance’s final Delta 2 rocket is now on display at the Kennedy Space Center Visitor Complex in Florida, a monument to an industry workhorse that helped build the GPS navigation satellite fleet and enabled a new era of Mars exploration.

Crews hoisted a covert spacecraft atop an Atlas 5 booster rocket this morning for its trek into an equatorial orbit next week.

Another batch of Atlas 5 rocket launch photos from Wednesday’s flight for the U.S. Navy carrying the Mobile User Objective System spacecraft.