South Korean President Park Geun-hye's visit to the US comes amid high tension on the Korean Peninsula.

There has been some speculation says the DPRK may launch its missile during Park's visit to Washington. Another launch window maybe July 27th, which marks the 60th year of the ceasefire in the Korean War in 1953.

US and South Korean intelligence agencies say the DPRK has halted missile launch preparations, but the two Musudan missile are still at its bases. And seven additional missiles including the medium-range Rodong and short-range Scud are also deployed in South Hamgyong province.

Meanwhile, the DPRK says the jointly-run Kaesong industrial complex can only be reopened if the South stops hostilities and military provocations.