Secretary Esper Says He's Concerned About North Korean Missile Tests

Defense Secretary Mark Esper responds to a question about recent short-range missile testing by North Korea. "Obviously we're concerned about their short-range missile tests...but on the other hand, we're not going to overreact. We want to take a measured response and make sure we don't close the door on diplomacy," he says. Joint Chiefs Chair General Joseph Dunford declines to be drawn on reports that North Korea is developing the capability of launching nuclear missiles from a submarine. close