This week on "Face the Nation," Margaret Brennan speaks to National Security Adviser Jake Sullivan after the U.S. launched strikes against Iranian-backed Houthis in Yemen, the latest retaliation after a drone strike last week killed three Americans. Plus, Sen. Kyrsten Sinema discusses the latest in the Senate immigration negotiations. Guests: Sen. Kyrsten Sinema, independent of Arizona, National security adviser Jake Sullivan House Intelligence Committee chair, Rep. Mike Turner, Republican of Ohio, and Rep. Jim Himes, Democrat of Connecticut, Retired Gen. Frank McKenzie, former head of U.S. Central Command