The Pentagon recently activated its global missile shield in anticipation of North Korea’s launch of a long-range missile, according to defense officials.

The measures include stepped-up electronic monitoring, deployment of missile interceptor ships, and activation of radar networks to areas near the Korean peninsula and western Pacific.

Three interceptor ships near Japan and the Philippines, as well as U.S.-based interceptors, are ready to shoot down the North Korean missile if space-, land-, and sea-based sensors determine its flight path is targeted at the United States or U.S. allies, said officials who spoke on condition of anonymity.