In 2007, six cruise missiles with nuclear warheads were mistakenly loaded onto a US Air Force bomber and transported from Minot Air Force Base in North Dakota to Barksdale Air Force Base in Louisiana without the knowledge the flight crew. A military investigation of the incident found that a number of procedures for handling nuclear weapons had been carried out improperly by numerous service members. Disciplinary actions were taken against many officers, including what high-ranking officials? Discuss