cnn's international diplomatic editor nic robertson is covering the conference. what are the issues at the forefront of this year's meeting and what a role does the u.s. is likely to be brooched by mr. pence when he speaks? >> reporter: well, i think very likely the audience will hear maybe what mike pence spoke about a couple of days ago in warsaw. >> that is that the united states really feels at odds at the moment, particularly britain, france and germany because of the creation of the financial instruments to get around the sanctions put on iran. that's a point of attention, we heard chancellor murkel talking about the interconnection of things, global warming, the big issues president trump opted out of on the noble stage, he opted more isolationism, more bilateral arrangements than the