Massive hunt turns up nose cone but doesn't omit tiniest fragments 02/04/2003 By LEE HANCOCK and TODD BENSMAN / The Dallas Morning News NACOGDOCHES, Texas - The unparalleled scavenger hunt for remnants of the crumbled Columbia expanded and intensified Monday as the first physical clues of the space shuttle's disintegration over Texas were delivered to federal investigators. At Barksdale Air Force Base near Shreveport, La., some human remains arrived Monday after an honor guard met two caskets holding other remains Sunday. "We're being respectful and honorable with the remains that have been, and will be, brought here in the...