At the pentagon after the so called fully loaded hijacked American Airlines jet liner crashed where is engins?

engines you know the two big 10,00lb jet engines that hung down about 15 feet under the wings of that 757 jet liner that GOV says crashed into the pentagon at less than 15 feet WITHOUT EVEN PUTTING A MARK ON THE LAWN.....good flying skills for some florida single engine trained terrorist pilots matter of fact IMPOSSIBLE and please spare the evaporation theory 10,000lb jet engines do not evaporate!!!!