Marine Corps Commandant Gen. James Amos told a Senate committee today that in a few weeks he will give Defense Secretary Robert Gates a set of metrics that, if followed, may get the Joint Strike Fighter's vertical lift version off probation earlier than the two-year mark set by Gates in January. Amos told the committee the program is on "a good glide slope" regarding the aircraft's weight, an issue that has plagued the F-35B's development. "I'm optimistic," about the program's...