Saturday's crash of a Marine Corps MV-22 tiltrotor aircraft in the Arizona desert will tighten even further a program schedule the service says has very little flexibility. The MV-22 is in the midst of its operational evaluation tests that Marine Corps officials hope will lead to a green light for full-rate production this fall, a decision that may now be postponed, according to a Marine Corps spokeswoman. Operational evaluation tests began last October and are scheduled to finish in June...
