The F-15E Strike Eagle is the ground-attack version of the F-15. It is a two-seater, holding a pilot and weapons system officer, or WSO pronounced "wizzo". It carries both air-to-air and air-to-ground ordinance. It can be distinguished from a F-15C because it has conformal fuel tanks on either side of the engine nacelles, and is a two-seater. If you see a two-seater without the conformal fuel tanks, it is the training version of the C and is an F-15D.