US Airforce vs Russian Airforce

http://nationalinterest.org/feature/top-guns-the-most-lethal-air-forces-the-planet-11814
http://variety.com/2017/film/news/top-gun-2-sequel-title-top-gun-maverick-1202452275/
http://www.express.co.uk/news/world/730069/Top-Gun-Russian-fighter-pilot-gives-NATO-airman-the-bird
https://www.cnet.com/pictures/chinas-most-dangerous-war-planes/
https://www.airforce.com/mission/history
http://www.military.com/air-force-birthday/air-force-history.html
https://en.wikipedia.org/wiki/Russian_Air_Force
https://www.globalsecurity.org/military/world/russia/av-history-1-1.htm
http://www.af.mil/News/Article-Display/Article/1191344/af-presents-fiscal-year-2018-budget/
https://en.wikipedia.org/wiki/Military_budget_of_the_Russian_Federation
http://www.janes.com/article/74248/russian-defence-budget-expected-to-be-cut-by-5-in-2018
https://www.globalfirepower.com/country-military-strength-detail.asp?country_id=russia
https://www.space.com/25275-x37b-space-plane.html
http://nationalinterest.org/feature/the-russian-air-forces-super-weapon-beware-the-pak-fa-11742
http://aviationweek.com/defense/future-bombers-under-study-china-and-russia
http://www.news.com.au/technology/innovation/design/new-russian-stealth-fighter-jet-revealed/news-story/797a5457bb96c0b34a563ae20bff935a
https://en.wikipedia.org/wiki/Sukhoi_Su-57
https://en.wikipedia.org/wiki/Mikoyan_MiG-41