No work has been reported at any of the other sites so far, which include the Chamjin Machine Factory test stand, Iha-ri Driver Training and Test Facility test stand, Magunpo Solid Rocket Motor Test Facility, Nampo Shipyard submersible test stand barge, Sinpo South Shipyard submersible test stand barge, Sinpo South Shipyard test stand, and Tonghae (Musudan-ri) Satellite Launch Facility.
As he did Monday, Trump has publicly professed satisfaction at the pace of negotiations with North Korea, saying last week there was "no rush" in completing talks with Pyongyang because USA and United Nations economic sanctions against North Korea remain in place. It contracted at the sharpest rate in two decades in 2017, South Korea's central bank has estimated, in a clear sign global sanctions due to Pyongyang's nuclear and missile programmes have hit growth hard. Later, North Korea announced it would instead launch a rocket meant to carry a satellite into orbit.
On Monday, the U.S. State, Treasury and Homeland Security departments said, "The global community can not let up on pressure" until North Korea ends its nuclear weapons program. The central plot of the book talks about how renewed tensions involving North Korea and a deadly border incident could quickly escalate into nuclear war, due to political miscalculation, miscommunication and brinksmanship. "Japan is happy, all of Asia is happy", he tweeted earlier in the day.
The advisory note issued on Monday night urged the worldwide community to stay aligned with the current United Nations sanctions regime, with the State Department saying: "The global community can not let up on pressure until the DPRK denuclearizes".
North Korea has insisted Sohae was only for developing satellites, but USA officials suspect it has also been used to ideal ICBM technology as the communist state sought to develop a nuclear weapon that could target the US mainland.
The US president told a news conference after the unprecedented 12 June summit that Mr Kim had promised that a major missile engine testing site would be destroyed very soon.More news: US Stance on Russian Federation in Syria Remains Unchanged, General Says
The comment by a State Department spokesperson comes as denuclearization talks have stalled amid North Korea's demands for a formal end to the 1950-53 Korean War. Marco Rubio, Florida Republican, said the USA shouldn't assume the Korean Peninsula is any safer now that the site is being dismantled.
The test site has been paramount to North Korea's intercontinental ballistic missile and space programs.
The dismantlement may lead to a breakthrough in the talks, analysts said.
FILE - North Korean leader Kim Jong Un shakes hands with U.S. Secretary of State Mike Pompeo, May 9, 2018, released by North Korea's Korean Central News Agency (KCNA) in Pyongyang.
Brooks said the challenge now is to continue to make progress with North Korea, and said that the level of diplomacy is high with abundant channels of communication now open on the Korean peninsula.
During that time, Trump repeatedly stressed that he believed North Korea would follow through based on his personal read of Kim's personality.