How FISA works
The memo drafted by Rep. Devin Nunes of the House Intelligence Committee alleged abuses of the Foreign Intelligence Surveillance Act (FISA) by the FBI and the Department of Justice.
Why it matters: There are a lot of myths about FISA, its associated courts, and the approval process the DOJ must go through to get a warrant to conduct surveillance. And questions remain about the application regarding the FBI's decision to surveil Carter Page following the memo's release.
Here's what you need to know about what FISA is and how the application process works.