The top Air Force official looking into last month's incident in which six nuclear-armed cruise missiles were mistakenly transported cross-country by service personnel has requested an extension of his investigation, Air Force Secretary Michael Wynne told reporters today. Air Force Maj. Gen. Doug Raaberg has already partially completed the service's review of the chain of events that led to an Air Force B-52 bomber being inadvertently loaded with live nuclear weapons slated for long-term storage during a flight from from...