Mass collection of US phone records violates the Fourth Amendment

John Yoo debates on Intelligence Squared, October 7, 2014

After 9/11 … we decided this would be a reasonable thing to do to try to find any more terrorists coming to the United States: by looking at phone numbers of people from abroad calling into the United States and what those phone numbers called—to try to detect patterns of enemy agents trying to infiltrate into the United States. That’s the purpose of the program.