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DigitalGlobe imagery of North Korea's 5MWe Reactor at the Yongbyon nuclear site. File photo: DigitalGlobe/Institute for Science and International Security via Getty Images

Satellite images of North Korea’s main nuclear site show railcar activity that could be associated with the reprocessing of radioactive material into bomb fuel, the Center for Strategic and International Studies said Tuesday.

"In the past these specialized railcars appear to have been associated with the movement of radioactive material or reprocessing campaigns. The current activity, along with their configurations, does not rule out their possible involvement in such activity, either before or after a reprocessing campaign."

Why it matters: The activity signs at Yongbyon nuclear site on April 12 come at a delicate time in negotiations between the U.S. and North Korea. President Trump's February summit with North Korean leader Kim Jong-un ended abruptly over a disagreement about the nuclear facility and sanctions.

Between the lines: Secretary of State Mike Pompeo hasn't ruled out a third summit taking place between Trump and Kim. Pompeo said Monday there are "lots of conversations taking place" and Trump is "determined to move forward diplomatically." He said Kim had repeatedly pledged a commitment to denuclearize.

"We collectively need to see that outcome move forward. And we’re working – our teams are working with the North Koreans to plot a – to chart a path forward so that we can get there. He said he wanted it done by the end of the year. I’d love to see that done sooner."

Go deeper

Updated 3 hours ago - Health

California surpasses 50,000 COVID-19 deaths

A man prepares a funeral arrangement in in Los Angeles, California, Feb. 12. Photo: Mario Tama/Getty Images

California's death toll from COVID-19 surpassed 50,000 on Wednesday, per Johns Hopkins data.

The big picture: It's the first state to record more than 50,000 deaths from the coronavirus.

4 hours ago - Technology

Facebook bans Myanmar military

A protester holds a placard with a three-finger salute in front of a military tank parked aside the street in front of the Central Bank building during a demonstration in Yangon, Myanmar. Photo by Aung Kyaw Htet/SOPA Images/LightRocket via Getty Images

Facebook said on Wednesday it would ban the rest of the Myanmar military from its platform.

The big picture: It comes some three weeks after the military overthrew the civilian government in a coup and detained leader Aung San Suu Kyi, causing massive protests to erupt throughout the country. Military leaders have been using internet blackouts to try to maintain power in light of the coup.

It's harder to fill the Cabinet

Data: Chamberlain, 2020, "United States of America Cabinet Appointments Dataset" Chart: Will Chase/Axios

It's harder now for presidents to win Senate confirmation for their Cabinet picks, an Axios data analysis of votes for and against nominees found.

Why it matters: It's not just Neera Tanden. The trend is a product of growing polarization, rougher political discourse and slimming Senate majorities, experts say. It means some of the nation's most vital federal agencies go without a leader and the legislative authority that comes with one.