george zimmerman call and what word he really used. let s go outfront. i m erin burnett. countdown to nuclear showdown. the rhetoric rising ahead of a make or break moment for iran and the rest of the world. a week from tonight, negotiators will be arriving to talk with iran about the disputed nuclear program. the debate over where iran will talk to the united states, britain, france, germany, china and russia may not just be rhetoric. this could derail talks and send the world down a path towards military strike. now, iran suggested it might move the venue from istanbul to beijing. here s what william cohen told me. the iranians are not interested in reaching an agreement, thane are not interested in producing a nuclear pow e. they re interested in acquiring nuclear weapons. now iran says it s for peaceful purposes but it isn t just the united states that s frustrated. turkey s prime minister stepped said today that iran s off tore move the venue was this. the offer