I don't think it has anything to do with what software he works on. I'd be willing to bet significant money that it was either a clerical error, or something m

I don't think it has anything to do with what software he works on. I'd be willing to bet significant money that it was either a clerical error, or something mundane from his ESTA form that got double-checked and came up "no". I am willing to bet this because I have been in that situation: https://news.ycombinator.com/item?id=14643861 https://news.ycombinator.com/item?id=14643861