NEW YORK -- The Air Force plans to design two variants of its new bomber, a manned version to carry strategic weapons and an unmanned version for conventional missions, according to the service secretary. Hardening the aircraft to carry nuclear weapons will add significant costs to the Air Force's efforts to field a new long-range strike bomber by 2018, Air Force Secretary Michael Wynne said today. While Pentagon leaders since early 2006 have expressed an interest in having some portion...
