The National Institute of Standards and Technology (NIST) in the US is introducing new security measures that limit the access of foreign scientists to its laboratories.[1] Foreign researchers from countries such as China, Russia, Iran, North Korea, Cuba, Venezuela and Syria are classified as high-risk and their access to the labs will be reviewed until March 31, and may be terminated if they have worked at NIST for more than three years or work on sensitive projects such as quantum technology or artificial intelligence.[1] Researchers from lower-risk countries could lose access from September or December if they have been in the workplace for more than two to three years.[1] Nové pravidlá obmedzujú maximálnu dobu pobytu zahraničných výskumných pracovníkov na tri roky, čo je problematické, pretože doktorandi zvyčajne potrebujú približne dvojnásobne dlhší čas na dokončenie svojho výskumu.[1] Scientists and observers fear that these changes could lead to the loss of up to 500 highly qualified researchers and prevent foreign students and postdocs from completing their doctoral projects.[1] Democratic lawmakers have called on NIST to be transparent and halt implementation of these changes until Congress can comment on whether they are necessary.[3]