To Be held in Huntsville, Ala., April 4-5
Each year around this time, John Tripp walks across a lunar
surface, pondering the challenges ahead for explorers brave enough
to take on its cratered terrain. For now, his "moon" is a winding
ribbon of cement footpaths looped around Huntsville's famed U.S.
Space and Rocket Center, where Tripp is a construction foreman.