DENVER -- Most of the work related to the analysis of alternatives for the Air Force's Next Generation Air Refueling System has been submitted to the Office of the Secretary of Defense, a senior Air Force official said today, putting a pin in deliberations which have spanned years . “We've done a lot of work on an analysis of alternatives for [NGAS],” Air Mobility Command Commander Gen. John Lamontagne said during a panel discussion at the Air and Space Forces...