Those are F-16 fighters that belong to the 414th Combat Training Squadron, that is Air Force's dissimilar air-to-air combat training (DACT) squadron. They operate aircrafts with non-US colours and non-US tactics.
At least the blue ones are originally ordered by Pakistan, but due to embargo in 90's they were not delivered. After a few years in Arizona sun they were taken into use in Nellis.
At least the blue ones are originally ordered by Pakistan, but due to embargo in 90's they were not delivered. After a few years in Arizona sun they were taken into use in Nellis.