A handwritten note by Richard William Smith, a British businessman who perished in the disaster, is heading to the auction block, where it could sell for up to $12,600
Staffers at the Dorchester County Historical Society in Maryland were baffled by the unusual machine, so they asked the public for help in determining its purpose
Called aerobraking, the technique allows the highly classified craft to change orbit without using propellant—and some are wondering why the agency has let us in on this news