sarah: earlier, we heard from leo dobbs, the spokesman for the refugee agency, the unhcr. sked if the movement had already begun. leo: not as far as i have heard. the returns are due to begin on monday. we think this is premature, because we believe that safeguards need to be put in place before any returns starts. for example, turkey needs to pass laws on temporary protections on people being sent back to turkey. we need to make sure that these protection meets are being met. sarah: that was unhcr's spokesman. the u.s. is hosting a nuclear conference about preventing nuclear weapons from falling into the hands of terrorists. north korea, south korea, japan, and europe were present. in talks with chinese president xi jinping, both presidents discussed sanctions on north korea. president obama praised the nuclear deal with iran, claiming it has been successful but more work is needed. earlier, washington correspondent, richard walker, spoke with rose go to molar. richard: the message here is that there has been progress made in terms of cutting out nuclear material and preve