CNN aired a high-profile report last week in which journalist Clarissa Ward ostensibly discovered a “forgotten prisoner” languishing in a windowless cell in Syria. The man claimed he had been arrested by dictator Bashar Assad three weeks earlier and was not aware the Assad regime had since been overthrown by rebels. On Sunday, an independent news service claimed CNN’s celebrity prisoner was actually a Syrian intelligence agent who tricked the network into giving him positive media coverage. Ward, who is CNN’s chief international correspondent, found the “prisoner” huddled beneath a blanket when she entered the headquarters of Syrian air force...