What Falcons and Black Knights fans need to know as Air Force fights for bowl eligibility and Army attempts to pull a home upset. Who, where, when: Air Force (5-3, 4-1 Mountain West Conference) at Army (1-7), Saturday, noon Eastern. TV: CBS Sports Network (Ben Holden and Randy Cross have the call). Gambling is illegal in most states: Air Force is a 7.5-point favorite. Would Air Force coach Troy Calhoun agree with that line?: Probably not, given all of Army’s advantages. Air Force’s advantages: David Ramsay at The (Colorado Springs, Colo.) Gazette has the stats — Air Force has beaten…