Turns out the most senior retired general to back Sen. Barack Obama crossed paths with Sen. John McCain during their active-duty years. Gen. Merrill A. McPeak, the Air Force chief of staff during 1991 Desert Storm, told The Washington Times he and Mr. McCain sat in the same National War College class of 1973-74. Mr. McCain, then a Navy commander, had been released by North Vietnam in March 1973 and arrived at the Fort McNair campus in July. "We both graduated," Gen. McPeak said of what is considered a ticket-punching step up the ladder to higher rank. Adm. Michael Mullen,...