@Strandjunker As an aside, my uncle, Prof Tom Kaiser, was working at Cambridge on atomic physics, and was going to testify on their behalf. He was blocked from entering the USA. As an amusing aside, he later moved into astrophysics, and one of his instrument packages was being launched on a USA rocket. He applied for USA entry again, on the basis of free exchange of scientific information, and was told he would be allowed into the USA, but would not be allowed information from his satellite package while in the USA, as he was a security risk!