The "fantastic" (The New Yorker) debate series Intelligence Squared U.S. makes its San Francisco debut to debate whether tech companies should be required to help the government access their customers' data in a situation like last year's dispute over the San Bernardino shooter's phone. John Yoo, former Bush administration Justice Department official, and Stewart Baker, former Assistant Secretary at Homeland Security, debate in support of the government. Professor Catherine Crump, former staff attorney at the ACLU, and Michael Chertoff, former Secretary of Homeland Security and architect of the Patriot Act, debate against them.