U.S. Secretary of Defense Hagel speaks at his news conference at the Pentagon in WashingtonBy way of Phil Stewart and David Alexander WASHINGTON (Reuters) – Safety Secretary Chuck Hagel introduced plans on Friday to bolster U.S. missile defenses in line with "irresponsible and reckless provocations" by way of North Korea, which threatened a preemptive nuclear strike in opposition to the US ultimate week. Hagel mentioned the Pentagon would add 14 new anti-missile interceptors at Fortress Greely in Alaska – an efficient reversal of an early Obama administration determination – and transfer ahead with the deployment of a 2d missile-protection radar in Japan. …