The Biden Transition November 23, 2020 1:13 pm 5 Things to Know About Alejandro Mayorkas President-elect Joe Biden nominated Alejandro Mayorkas as Secretary of Homeland Security. Here are five things to know about the former deputy secretary of DHS. US & World Videos 2:22 Karen Read jurors hear opening statements 19:28 Karen Read murder trial underway: Here's what we learned on Day 1 0:49 5 things to know about Mike Trout 2:17 MIT and Tufts call for student protesters to shut down encampments 1:49 Finalists in math competition hope their model helps ease housing crisis