Gen. James Amos, in line to be next commandant of the Marine Corps, endorsed the Expeditionary Fighting Vehicle to Congress last week, but stopped just short of saying the service needs it to accomplish its mission. Defense Secretary Robert Gates has long questioned whether the EFV is truly necessary for the future of the Marines. But current commandant Gen. James Conway told reporters at a press briefing last month, "It's my belief that if that program were canceled outright, we...