altitude. warships from both countries now searching for the crew, which would be a two-man crew, if indeed the missing plane is an f-4. turkey also flies f-16s, most of which carry a single pilot. the prime minister tonight meeting with cabinet members. the prime minister s office saying turkey would respond devicisively once all the facts are established. this is, as you d imagine, a very fast-moving story. ivan watson is following it tonight for us from istanbul. barbara starr at the pentagon. also with us, the senior fellow at stanford university hoover division. fran townsend as well. who presided over many tense moments as homeland security adviser to president george w. bush. you say there s little doubt syrians knew this was a turkish plane? absolutely. i think this is a message being sent by the bashara scream to turkey. turkey s four times larger. turkey s a nato member. turkey has stepped into the weariven the ement if you will. my now tou mediation of the turks.