The world has been turned upside-down the past few weeks, with flight cancellations, global travel bans and a massive slowdown of worldwide commerce.

For immigrants to the United States here on work visas, these are particularly ambiguous and challenging times.

We’ve had prominent Silicon Valley immigration attorney Sophie Alcorn of Alcorn Immigration Law talk about all the nuances of immigration the past few months across our stages and through her Dear Sophie column on Extra Crunch, where she has answered questions like “how do I get visas for employees who work from home” and answering questions around the changes to the H-1B process.

Now, she’ll join us for a conference call we are hosting for Extra Crunch members tomorrow, Tuesday, March 24 at 1 p.m PDT (dial-in details below the jump) to discuss all the news that has happened the last few weeks and its impact on immigrants to the U.S. going forward.

I’ll join Sophie and Silicon Valley reporter Natasha Mascarenhas to talk about all the changes underway in the immigration system, with a focus on the visas typical for founders and workers in Silicon Valley. And then we will take questions from the audience to discuss the trends on what Sophie is seeing across her clients and across the Valley today.

If you aren’t able to join us, we’ll post a transcript of the discussion on Extra Crunch. Here’s how to dial in to Tuesday’s call: