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New Delay for Mysterious Military Space Plane Launch

Stretching 29 feet in length and weighing 11,000 pounds, the second Boeing-built X-37B became the longest on-orbit space vehicle on June 16, 2012 when it completed a 469-day mission with an autonomous landing at Vandenberg Air Force Station in

Air Force's mystery mini-shuttle

A top-secret mini-space shuttle has blasted off from Cape Canaveral. The Air Force launched the unmanned spacecraft Dec. 11 aboard an Atlas V rocket.