Stand by to reduce thrust on main drive rockets!' The tall, broad-shouldered officer in the uniform of the Solar Guard snapped out the order as he watched the telescanner screen and saw the Western Hemisphere of Earth looming larger and larger.'Aye, aye, Captain Strong,' replied a handsome curly-haired Space Cadet. He turned to the ship's intercom and spoke quickly into the microphone.'Control deck to power deck. Check in!'Power deck, aye,' a bull-throated voice bellowed over the loud-speaker.