Response: Two sea-launched Tomahawk Land Attack Missiles (TLAMs) from a U.S. submarine to overfly the North Korean peninsula from east to west and the cities of Pyongyang and Nampo and land about 20 miles offshore in the Yellow Sea, and two air-launched AGM-158B Joint Air-to-Surface Standoff Missile-Extended Range (JASSM-ERs) from a B-1B to overfly the North Korean peninsula from west to east and the cities of Chongjin and Wonsan and land about 20 miles offshore in the Sea of Japan.  All four missiles would land simultaneously with enough of a conventional payload to create a large “boom.” If any vessels are in the landing areas, it would be unfortunate but acceptable collateral damage. Message to send: Coordinates of landing points, with additional launches dependent on North Korean “behavior.”