A report published by the Center for Strategic and Budgetary Assessments (CSBA) in 2015 found just 59 kills since the 1990s - the large majority of which were in the First Gulf War…But in the modern era, the human eye was quickly replaced. From 1965-1969, guns accounted for 65% of air-to-air kills, the CSBA says…But between 1990 and 2002, they accounted for just 5% of kills - with the rest carried out by some kind of missile.