The Air Force's $165.5 billion fiscal year 2020 budget request -- a $10 billion increase over FY-19 -- would buy 48 F-35s, procure eight new F-15EX fighters, boost research and development efforts by more than $4 billion and fund the creation of a Space Force headquarters. The service's base budget request includes $25.9 billion for procurement, $35 billion for research and development, $54.9 billion for operations and maintenance and $42.3 billion for overseas contingency operations -- $29 billion of that...