10 things in tech you need to know today

Good morning! This is the tech news you need to know this Tuesday.

1. *President Donald Trump signed a proclamation Monday halting a variety of immigration visas.* It temporarily suspends H-1B, H-2B, H-4, J-1, and L-1 visas, affecting the tech industry, students, and au pairs, among others.
2. *Amazon, Google, Twitter, and...