F-16s being loaded onto a Ukrainian An-124 in Arizona, USA.

I had to look it up as well “The 309th Aerospace Maintenance and Regeneration Group (309 AMARG) is a one-of-a-kind specialized facility within the Air Force Materiel Command structure.“

Dunno if it the only one or not

https://www.dm.af.mil/About-DM/Units/Mission-Partners/309-AMARG/