Recently, F-22 Raptor pilots from the Pacific Air Forces' 3rd Wing simulated refueling in a remote location.
The New Mexico Environment Department has asked the Air Force for the money within 30 days.
The Ninth Judicial District Attorney said prosecutors would be unable to prove the case to a jury beyond a reasonable doubt.
New Mexico is suing the U.S. Air Force over groundwater contamination at two military bases in the state.
Chemicals associated with firefighting foam once used at Cannon AFB have been detected in groundwater on the installation.
Recent tests show three of 25 private water sites near Cannon Air Force Base are not safe to drink.
The campaign of President Donald Trump released a letter from 235 retired senior officers backing his re-election.
The news comes four years after the Air Force laid out initial plans for what its future fighter jets might look like.
The recent exercises were one of many the Air Force is conducting to test its Advanced Battle Management System.
A veteran of the Marine Corps and Army National Guard, he went through boot camp more than four decades ago.
Cmdr. Robert Arias is at least the third Navy commander removed from his job in recent weeks.