It looks like the US Air Force has added a new tool to their toolbox of weapons to deal with any North Korean contingency:

The U.S. military has deployed to South Korea state-of-the-art missiles equipped with precision strike capability for a possible North Korea contingency.

Multiple diplomatic sources said on Monday that to their knowledge, U.S. Forces Korea(USFK) recently put in place around ten Joint Air-to-Surface Standoff Missiles(JASSM) at its air base in Gunsan, North Jeolla Province.

It is also known that the missiles can be mounted on F-16 fighter jets deployed to South Korea on a regular and rotational basis.

The missiles are assessed to have precision strike ability to hit key facilities in Pyongyang when launched from south of the military demarcation line(MDL).  [KBS Global]