Anderson Cooper 360

AC360 411: Inside the NSA

FBI Director Robert Mueller defended the collection of Americans’ phone records and called the controversial surveillance program legal when he spoke Thursday on Capitol Hill. Muller told the House Judiciary Committee that had the information-gathering been in place before the 2001 terrorist attacks it could have helped track down one of the 9/11 hijackers.

But some lawmakers and civil liberties groups are blasting the surveillance programs conducted by the National Security Agency after classified leaks last week detailed how they worked. NSA contractor Edward Snowden leaked the top secret information and is now in hiding in Hong Kong. He could face criminal charges here in the U.S. Here’s the AC360 411 on the NSA: