F4 Phantom fighter jet.
Two seats, multi-role fighter jet that could be used as both an interceptor or bomber, by just loading a different set of weapons. When very lightly loaded and with a set of anti-air weapons only, it could fight on par with other military interceptors-only aircrafts, like the fearsome Russians MIGs.
It's the most numerous produced super sonic military aircraft in US history.
It finally left service near the end of the nineties, but it's still in use in other countries.