American Airline's 8,000 pilots have been casting votes on authorization for a month now, escalating a long-running labor dispute that is creating serious flight delays at the nation's No. 3 carrier.  After the voting deadline passes at noon central time on Wednesday (1700 GMT), the union may not release the results, instead use them as a negotiating card in talks with the airline, Tom Hoban, a spokesman for the Allied Pilots Association, said Tuesday.