Nuclear arms mistakes were reason for dismissals, but deeper divide over service's mission was at play, officers and analysts say. By Bob DeansWASHINGTON BUREAU Saturday, June 07, 2008 WASHINGTON — In April, Defense Secretary Robert Gates traveled to Maxwell Air Force Base near Montgomery, Ala., to address an elite group of majors and colonels attending the Air War College in preparation for promotions to command positions. For months, Gates had been at odds with Secretary of the Air Force Michael Wynne and Gen. Michael Moseley, the Air Force chief of staff, over how to increase the use of unmanned aerial...