DENVER -- The Air Force needs a Next Generation Air Dominance penetrating fighter jet to maintain survivability and lethality in a contested Indo-Pacific environment, top service leaders said last week. “If we’re in this dangerous and dynamic time, I want to give the president as many options as we possibly can,” Air Force Chief of Staff Gen. David Allvin said during the Air and Space Forces Association's Warfare Symposium here. “So that means yes, keep on the modernization. Yes, NGAD...