Energy leaders from all over the world are gathering in Vienna for a key OPEC seminar as the threat of tariffs remains front and center. That's where Brian Sullivan is and he's now joined by Helim Croft, the global head of commodity strategy at RBC. Brian, take it away.Yeah, Kelly, thank you. Yeah, listen, obviously well known to our viewers, CNBC contributor and and somebody that knows OPEC as well or better than anybody in the world. Helma Croft with us here in Vienna, Austria.Helma, this was an interesti ...