An unmanned NASA rocket designed to help develop a new space taxi service to the moon streaked through the sky on Wednesday night on a successful two-minute test flight.<br/>The 327-foot Ares 1-X rocket, currently the world's tallest, blasted off at 9 pm Indian time from a modified space shuttle launch pad at Cape Canaveral in Florida. Firing its motors for just over two minutes, the rocket flew to an altitude of 45 km and reached a speed nearly five times the speed of sound. It parachuted back down into the Atlantic Ocean, where it was to be recovered by a NASA ship.<br/>