Los Alamos National Laboratory (copy)

Los Alamos National Laboratory.

Citizens of four countries — China, Iran, North Korea and Russia — will be unable to enter Los Alamos National Laboratory and other national labs due to new federal requirements signed into law at the end of the Biden administration.

The prohibition is expected to affect about 70 employees at Los Alamos, based on the lab’s estimate that about 0.4% of current staff are citizens of those countries. Additionally, it would prohibit visits by scientists and students from the four countries.

The most recent National Defense Authorization Act — the voluminous budget document for the Department of Defense — prohibits citizens of those nations from accessing national security labs or nuclear weapons production facilities in an effort to protect the U.S.’ “leading technological edge.â€

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