Why is the U.S. at war with Iran?

In less than a week, the Trump administration's justifications for the war in Iran have already changed several times, as have the administration's goals for what it wants to accomplish. We discuss both, plus what could come next. This episode: senior White House correspondent Tamara Keith, national security correspondent Greg Myre, and senior national political correspondent Mara Liasson. This podcast was produced by Casey Morell and edited by Rachel Baye. Our executive producer is Muthoni Muturi.