An investigation that began by looking into drug use across the Air Force has ballooned into a discovery by service officials that around 20 percent of the nuclear missile crew force at Malmstrom Air Force Base, MT, cheated on a missile proficiency test or knew about that cheating and did not report it. Air Force Secretary Deborah Lee James and Chief of Staff Gen. Mark Welsh revealed the incident, which occurred in August or September, at a press briefing at...