The Air Force may consider speeding up its procurement plans for the F-35A, but has cautioned that doing so prior to the delivery of Block 4 in the early 2020s would add considerable retrofit costs to the program. Maj. Gen. Jerry Harris, deputy chief of staff for strategic plans, programs and requirements, told the House Armed Services tactical air and land forces subcommittee at a Feb. 16 hearing the service is concerned that buying more jets than currently...