If F-35 flight testing extends beyond the joint program office's current projection of February 2018, the program could shift $100 million from Block 4 modernization to complete those tests -- a move that would delay follow-on development by at least six months. Lt. Gen. Christopher Bogdan, F-35 program executive officer, during a Dec. 19 roundtable with reporters at his office in Arlington, VA, cited an Office of the Secretary of Defense estimate that flight testing for the system development and...