FILE - In this Nov. 7, 2013 file photo, Air Force Chief of Staff Gen. Mark Welsh testifies on Capitol Hill in Washington. A drug investigation of officers at six Air Force bases, including two that operate nuclear missiles, has been widened to include allegations of cheating on certification tests, defense officials said Wednesday. Welsh and Air Force Secretary Deborah Lee James planned a news conference Wednesday to update the status of the investigation. (AP Photo/Jacquelyn Martin, File)