Shirtsleeved, tousled, and bright-eyed with the dream that gave Germany its V-2 and the U.S. its first orbiting satellite, bull-shouldered Wernher von Braun paced the yellow-walled office in Building 4488, nerve center of the Army Ballistic Missile Agency at Huntsville, Ala. Already on his cluttered mahogany desk last week was a new satellite assignment: preparing a Jupiter-C to power Explorer II into space late this month. More work was on the way; called by the telecommunications room, Space Engineer von Braun hurried down the hall, talked to Defense Department Missile Director William...