Red Sea attacks threaten to escalate the US- Iran War

Iran-aligned Houthis have threatened to blockade the Red Sea, raising concerns about global oil supply and a broadening of the Iran War. Gregg Carlstrom, The Economist's Middle East Correspondent, talks about how we got to this point. Thomas Juneau, an Associate Professor at the University of Ottawa's Graduate School of Public and International Affairs, discusses why the Houthis are engaging in this maritime blockade.