It sounds like a number we can’t come back from. But just remember since 1996 the department of Defense has lost almost 9 trillion, nearly half of that. Not spent, not paid out for weapons, facilities, LOST. No idea what happened to it or where it went.
https://www.reuters.com/article/us-usa-pentagon-waste-specialreport/special-report-the-pentagons-doctored-ledgers-conceal-epic-waste-idUSBRE9AH0LQ20131118
And trump is giving them more to lose track of.