Roy Cohn and Donald Trump's Giuliani

CNN's John Sutter looks at why Roy Cohn is no more. The former US Attorney for New York prosecuted Julius and Ethel Rosenberg on espionage charges in the 1950s. He says it was a mistake to charge them with being spies, but they were guilty of other crimes as well. Now he asks if Rudy Giuliani can do his job right this time around.