Sources: 1. GlobalSecurity.org, US Weapons Systems and World Military Guide, http://www.globalsecurity.org/index.html. 2. Venik's Aviation, Brief Guide to Russian Combat Aircraft using Jane's Information Group data, and photo galleries, http://www.aeronautics.ru/. 3. Russian Aviation References, Flankers and Other Russian Aircraft, http://www.flankers.co.uk/.
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