Sanchez also noted that the upgrade for the Block 30/35 aircraft includes work on crewed/uncrewed teaming with the Air Force. A rendering the Air Force has released of the future F-47. The Block 20 jets are all assigned to second-line duties. Meanwhile, F-22 proponents in the Air Force have made the case for keeping the Block 20 jets even without upgrades. The Air Force has no official replacement for its fleet of F-22s, Air Combat Command confirmed in the summer of last year.