AN/ALQ-254 Viper Shield Next-generation EW System For F-16V GDC 3 years ago Artist’s illustration of F-16V Block 70/72 aircraft. An expert said that Lockheed Martin is investing in F-16V Block 70/72 upgrades to prepare it for possible future acquisition by the US Air Force. (L3Harris) You need to be logged in to view this content. Please Log In. Not a Member? Join Us