ankara/istanbul turkey call syrian president bashar al-assad immediate ouster friday voice support u.s. missile strike one air base say creation safe zone protect civilians important ever turkey nato member part u.s.-led coalition islamic state long argue peace syria assad follow rapprochement russia appear recent months accept possibility syrian leader stay transitional role necessary oust regime soon possible leadership syria foreign minister mevlut cavusoglu tell reporters friday harden turkey tone want go transition government continue commit humanitarian crimes necessary step oust take comment come unite state fire cruise missiles syrian airbase say deadly chemical weapons attack launch week first direct u.s. assault assad government six years war president tayyip erdogan spokesman ibrahim kalin say u.s. action mark important step ensure chemical conventional attack civilian population go unpunished say no-fly zone enforce erdogan yet comment u.s. missile strike quote late thursday u.s. action say turkey would welcome u.s. military action syria would ready assist need stance could complicate turkish efforts repair tie russia damage november 2015 turkey shoot russian fighter jet near syrian border relations gradually repair since august russia turkey jointly broke ceasefire syrian city aleppo end last year struggle power russia unite state future syria turkey stumble back forth two say metin gurcan former military officer security analyst istanbul policy center period turkey make sharp u-turns ... sometimes extremely pro-washington sometimes pro-moscow could lead turkey perceive inconsistent unpredictable therefore unreliable actor cavusoglu say coalition inform u.s. missile strike speak phone french german foreign minister although say also say contact initiate russian foreign minister sergei lavrov u.s. secretary state rex tillerson turkey call assad 's ouster say support u.s. missile strike