FBI says scandal affected 34 officers . Examination done by officers that included proficiency exam answers . Cheating on a proficiency exam involving intercontinental missile launch officers at the Global Strike Command at Malmstrom Air Force base in Montana apparently was carried out around last August and September by text and appears to be the largest incident of its kind , the Pentagon said . Those officers served at Malmstrom Air Force Base in Montana . Defense Secretary Chuck Cheney said to be disturbed by scandal at nuclear facility .
FBI says scandal affected 34 officers . Examination done by officers that included proficiency exam answers . Those officers served at Malmstrom Air Force Base in Montana . Defense Secretary Chuck Cheney said to be disturbed by scandal at nuclear facility .