September 25, 2019 Joseph Bermudez—
Collected eleven months after the image provided in Part 4 (December 10, 1967) this November 21, 1968 KH-4B image of the Yongbyon Nuclear Research Center does not show any significant developments in the operations (with the IRT-2000 research reactor), support or administrative/laboratory areas. It does, however, show continuing development within the village of Sang-dong and the early stages of construction for a new road bridge across the Kuryong-gang in the Pungang-ni area that will connect the support area to the opposite side of the river. Taken as a whole, these developments represent both continuation of a first-phase construction project for the facility and the earliest infrastructure development stages within a longer-term plan for future expansion.
August 21, 2019 Joseph Bermudez and Victor Cha—
The Pakchon Uranium Concentrate Pilot Plant is one of only two declared and known uranium concentrate plants in North Korea (Pyongsan Uranium Concentrate Plant at Pyongsan is the other). This facility was used for Yellowcake production at least through the mid-1990s, and therefore would require inspection under any new U.S.-DPRK denuclearization declaration and agreement as it has not been subject to international inspection for over 25 years since IAEA visits to the site as part of the Full Scope Safeguards Agreement process in 1992.
July 18, 2019 Joseph Bermudez—
Acquired almost two years after the image provided in Yongbyon Declassified Part III (February 11, 1966), this December 10, 1967 image of the Yongbyon Nuclear Research Center is one of the first acquired by the improved reconnaissance KH-4B. Among other improvements, the resolution of the newer KH-4B was 1.8 meters versus 2.7 meters of the earlier KH-4A allowing for considerably better image quality.
June 20, 2019 Joseph Bermudez—
Acquired seven months after the image provided in Yongbyon Declassified Part II (August 23, 1965) this 2.7-meter resolution image covers the Yongbyon area on February 11, 1966. While the general area remains primarily engaged in agricultural activity typical of rural North Korea during the 1960s, significant construction activity is observed at the nascent Yongbyon Nuclear Research Center and adjacent village of Sang-dong.
June 20, 2019 Joseph Bermudez and Victor Cha—
Satellite imagery of the No. 112 Factory (sometimes identified as the January 12th Factory) located in Kusong, North Pyongan suggests that North Korea is constructing a monument memorializing its first successful Hwasong-12 intermediate range ballistic missile (IRBM) launch on May 14, 2017.
April 18, 2019 Joseph Bermudez and Victor Cha—
April 15 railcar movement observed in Airbus satellite imagery at North Korea's Yongbyon facility provides no further understanding concerning the presence of these specialized railcars other that their probable use for the movement of radioactive material.
April 16, 2019 Joseph Bermudez and Victor Cha—
DigitalGlobe satellite imagery of North Korea’s Yongbyon Nuclear Research Facility acquired on April 12th shows the presence of five specialized railcars near the Uranium Enrichment Facility and the Radiochemistry Laboratory.
In the past these specialized railcars appear to have been associated with the movement of radioactive material or reprocessing campaigns.
April 10, 2019 Joseph Bermudez and Victor Cha—
On the eve of President Trump’s summit with ROK president Moon Jae-in, commercial satellite imagery acquired on April 7 shows that, although not conclusive, North Korea may be preparing for a parade to honor Kim Il-sung’s birthday (April 15) or KPA Foundation Day (April 25).
April 1, 2019 Joseph Bermudez and Victor Cha—
Commercial satellite imagery of North Korea’s Yongbyon Nuclear Research Facility acquired on March 28th shows normal operations with a low-level of activity throughout the facility... Beyond Parallel datasets have found that North Korea will engage in provocative acts on average…