The debate series Intelligence Squared U.S. makes its San Francisco debut, in partnership with the National Constitution Center, with a debate about digital privacy, cybersecurity, and the Fourth Amendment. Arguing for the motion, Tech Companies Should Be Required to Help Law Enforcement Execute Search Warrants to Access Customer Data, are John Yoo and Stewart Baker. Arguing against the motion are Catherine Crump and Michael Chertoff. John Donvan, correspondent for ABC News, moderates.