The McDonnell Douglas F-15 Eagle, after more than 25 years of service, was still the U.S. Air Force's premier fighter as the year 2000 approached. It is the only aircraft in the U.S. Air Force arsenal capable of launching the ASAT anti-satellite missile. It also serves with the air forces of Israel, Japan and Saudi Arabia. The single-seat F-15C and two-seat F-15D models were followed by the two-seat, dual-role F-15E "Strike Eagle," the world's most technologically advanced fighter.