I'm Peter Roberts, immigration attorney who does work for YC and startups. AMA

I'll be here for the next 6 hours. As usual, there are lots of possible topics and I'll be guided by whatever you're interested in. Please remember that I can't provide legal advice on specific cases because I won't have access to all the facts. Please try to stick to a factual discussion in your questions and comments and I'll try to do the same in my answers! Previous threads we've done: https://news.ycombinator.com/submitted?id=proberts.