Trump set to impose new Iran sanctions, warns of "obliteration" if war erupts
President Trump is set to impose new sanctions on Iran. This comes after the country downed a U.S. drone and allegedly attacked oil tankers in the Middle East. CBS News White House correspondent Ben Tracy reports from Washington, and Asha Castleberry, a national security analyst, U.S. Army veteran and foreign policy professor at George Washington University, joined CBSN to explain the latest developments.