“Cut it some slack” is what Undersecretary of Defense for Acquisition Technology and Logistics Frank Kendall asks critics of the F-35 Joint Strike Fighter program. Kendall made those comments Thursday at a ceremony marking the delivery of two F-35s to Australia. The F-35 isn’t likely to go away soon, but the buzz about what would replace it may be getting a little louder. Robert Farley is assistant professor at the Patterson School of Diplomacy and International Commerce. He writes in The National Interest about five options for replacing the F-35. He said on In Depth with Francis Rose that one choice is restarting the F-22 line.