The body of airman was recovered from a lake in New Mexico on Monday, two days after the person went missing at the popular recreation spot.
Advanced jets like the F-35 have stealth coatings, unique materials and cutting-edge technologies that take more work to maintain, driving up costs.
Air Force officials regret not getting data rights to the F-35, which has slowed repairs, and promised not to make the same mistake on the F-47.
The additional 1,100 troops would bring the military close to 10,000 total deployed in support of the border mission.
