A recent Associated Press story about escalating tensions from the annual U.S.-South Korea military exercises quotes Jeffrey Lewis from an article he wrote for the 38 North website: “The appearance of a new long-range artillery system that is specifically linked to North Korean fears about decapitation strikes deserves our attention, even if the possibility of nuclear armament is only hinted at.”

Lewis is director of the East Asia Nonproliferation Program at the James Martin Center for Nonproliferation Studies of the Middlebury Institute of International Studies at Monterey.