US leaders worry about escalation after North Korea fires missiles

WASHINGTON (NEXSTAR) - North Korea has the global community on edge after firing missiles into the sea, and defense leaders in the United States are responding with efforts to deter escalation.North Korea has fired several rounds of test missiles this week, leading to heightened tensions in the area. Defense experts worry they'll take it further, with growing concerns about nuclear weapons."We are focused on making sure that they don't choose to employ a nuclear weapon or choose to attack South