Andrew Moffatt, 7, left, and his brother William, 5, of Seabrook sample the water following dedication ceremonies of a 75-foot-long fountain in memory of the seven Columbia astronauts at the Arts Alliance Center of Clear Lake Saturday. Tribute flows for crew New fountain dedicated to Columbia astronautsBy ALLAN TURNER COLUMBIA'S CREW Columbia's crew waves good-bye as the astronauts prepare to board the space shuttle on Jan. 16. A wave-inspired brick fountain featuring seven jets of water -- one for each of the astronauts aboard the doomed Columbia space shuttle -- was dedicated Saturday at a Nassau Bay art museum...