Here is an interesting remark by Edward Snowden during the interview:

Journalists should ask a specific question: since these programs began operation shortly after September 11th, how many terrorist attacks were prevented SOLELY by information derived from this suspicionless surveillance that could not be gained via any other source? Then ask how many individual communications were ingested to acheive that, and ask yourself if it was worth it. Bathtub falls and police officers kill more Americans than terrorism, yet we've been asked to sacrifice our most sacred rights for fear of falling victim to it