Space Elevator
Thomas Nugent, left, and Jordin Kare of the LaserMotive team talk about their entry in the $2 million Space Elevator Games at the NASA Dryden Flight Research Center at Edwards Air Force Base, Calif., Wednesday, Nov. 4, 2009. In a the test of the concept, robotic machines powered by laser beams will try to climb a cable suspended from a helicopter, on a course 900 meters (2,953 feet) high. (AP Photo/Reed Saxon)