USAF F-15Cs train with Su-30MKMs for the first time While we often talk about the newest fifth-generation fighters in the US (and now others') inventory, it can't be forgotten that the vast majority of the operational fleet consists of so-called "legacy" fourth-generation machines. Though having sometimes served for decades, many of these fighters are still extremely capable. The Boeing F-15C Eagle is considered by many to be the finest air superiority machine ever built. Recently in April, the 18th Wing's 67th Fighter Squadron, which flies active electronically scanned array radar-equipped versions of the venerable Eagle, participated in a two-week exercise...