An experimental robotic space plane developed for the Air Force is slated to launch Tuesday from Cape Canaveral, fueling an ongoing mystery about its hush-hush payload and overall mission.
Air Force officials offered few details about the mission. They say the unmanned space plane, which resembles a miniature version of the space shuttle, simply provides a way to test new technologies in space, such as satellite sensors and other components.
But this is the third time that the Air Force will send an X-37B Orbital Test Vehicle into orbit. Launch is planned for 10:03 a.m. PDT.
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