content: Half a trillion was the estimated 50 year lifespan costs for procurement,  fuel, training, maintenance, and ordinance used based off inflation and the last 30 years of operating expensive planes. They have at best spent 5-10 billion and a lot of that cost is concurrent manufacturing of test aircraft. No one's spent half a trillion dollars on a plane unless you count the total operating costs of previous fighter jets in the last 40 years.