In a new and ridiculous policy, the US is denying Israeli scientists who work at the Dimona  reactor site an opportunity to refresh their knowedge, Joshua Pundit reports:

Ma'ariv reported today that the Israeli government was stunned when every nuclear technician at Israel's Dimona reactor who had submitted visa requests to visit the United States for ongoing university education in Physics, Chemistry and Nuclear Engineering had their visa applications summarily rejected, specifically because of their association with the Dimona reactor.

This is a new policy decision of the Obama administration. Up until now, it was routine for Israeli nuclear scientists and technicians to receive such visas and to study at US universities.[snip]eportedly the US has an unofficial embargo on selling anything to be used at the site.

Professor Zeev Alfasi, the head of Nuclear Engineering at Ben-Gurion University in the Negev stated that "the United States doesn't sell anything nuclear-related to the Dimona reactor, and that means absolutely nothing. Radiation detectors, for example have to be purchased now in France because the USA refuses to sell these to Israel."