Tapes show pilots calmly averted D/FW collision Airport worker failed to get OK to cross runway in November 01/01/2003 By HOLLY WARREN / The Dallas Morning News American Airlines pilots calmly averted a collision in November when a convoy of vehicles crossed a runway in front of a Boeing 777 preparing to take off at Dallas/Fort Worth International Airport, audiotapes released Tuesday show. "American 2421 heavy is aborting. You got trucks on the runway," the pilot told air traffic controllers. The runway incursion occurred Nov. 21 when an employee led four vehicles across a runway at the same time...