Osama bin Laden's son-in-law and former al-Qaida spokesman Sulaiman Abu Ghaith is expected to appear in a New York courtroom Monday afternoon.
Abu Ghaith was captured by U.S. officials in February, and his arrest is considered important not just because he was so close to bin Laden, but also because the Obama administration has decided to try him in a federal court instead of using a military commission at Guantanamo Bay, Cuba.
As the Senate returns from a two-week spring recess Monday, topping its agenda is legislation to try to curb the kind of gun violence that took the lives of 20 first-graders in Connecticut last December.
Recent polls show broad popular support for enhanced background checks and bans on military-style guns and ammunition. But many members of Congress side with gun-rights advocates who oppose such measures.
And those advocates are increasingly making the case that Americans need guns to fight government tyranny.