U.S. weighs military strike on Syria The U.S. is building a multi-nation strike force against Syria to respond to an alleged chemical attack on a rebel-held town near Damascus. Russia has urged America to avoid taking military action RUSSIAN PRESENCE IN SYRIA: About 4,000-5,000 military personnel Pro-government control (Russia, Iran, Syria) Rebel forces Kurds Turkey and allies So-called Islamic State Airbase Known Russian position Russian warships (11 vessels) Range of Russian air defence missiles S-400 400km S-400 250km S-300 150km Shayrat airbase U.S. launched missile strike in retaliation for chemical attack in April 2017 Homs Damascus Palmyra T4 Hama ISRAEL LEBANON JORDAN TURKEY SYRIA IRAQ River Euphrates Raqqa Deir al-Zour Latakia Khmeimim Tartus Aleppo 100km 60 miles U.S.-WESTERN FIREPOWER U.S.: Two destroyers and possible submarine in eastern Mediterranean. USS Harry S Truman carrier strike force en route from U.S.east coast. Aircraft – including F-22 stealth jets – in Qatar, Jordan and Turkey. About 2,000 troops on ground in Syria France: Missile-armed frigate in Mediterranean, Rafale jets in UAE and Jordan UK: Typhoon and Tornadostrike aircraft at Akrotiri in Cyprus IRAN RUSSIA IRAQ CYPRUS TURKEY Incirlik Al Udeid QATAR SYRIA SAUDI ARABIA JORDAN EGYPT Al Dhafra UAE Sources: AFP, Business Insider, ISW, The National Interest