In 2015 a PhD scholar attending a security conference was sent back citing national security concerns. This was absurd as she was an Indian, studying in Montrea

In 2015 a PhD scholar attending a security conference was sent back citing national security concerns. This was absurd as she was an Indian, studying in Montreal and has no past involvement in any untoward thing. In 2017, a friend doing his PhD in artifical intelligence in Germany was made to undergo a thorough interview at the border to determine if he is a threat on account of his work. Again, this was absurd to say the least. In this March, my SO (French) chose to not attend a tier 1 conference in AI where she was going to present her work. She, having the brains for both of us, was prescient enough to cancel her trip in Feb-March, a bit before the current border policies came into full force and europeans were detained. I have never gone, nor will I ever go to the United States. Not for scientific purposes or leisure. For over a decade I have been voicing concerns about hosting conferences in a country which is inaccessible or hostile to a vast section of the scientific community. I am glad to see this shift.