Israel concerned over Su-57 debut in Syria

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Israel concerned over Su-57 debut in Syria // Military news
http://www.flightglobal.com/news/articles/israel-concerned-over-su-57-debut-in-syria-446347/

Russia's surprise deployment of Sukhoi Su-57s to a base inside Syria has positioned its new stealth fighter within the same region of operations as the Israeli air force's Lockheed Martin F-35I.
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