Top secret: Keeping documents classified

Government documents that are classified as confidential, secret or top secret constitute information that would cause damage to the country's security if it were revealed. CBS News national security correspondent David Martin looks at the inner workings of America's classification apparatus – which covers millions of documents a year – and the difficulties of making classified information public.

"CBS Sunday Morning" features stories on the arts, music, nature, entertainment, sports, history, science and Americana, and highlights unique human accomplishments and achievements. Check local listings for CBS Sunday Morning broadcast times.

Subscribe to the "CBS Sunday Morning" YouTube channel: http://bit.ly/20gXwJT
Get more of "CBS Sunday Morning": http://cbsn.ws/1PlMmAz
Follow "CBS Sunday Morning" on Instagram: http://bit.ly/23XunIh
Like "CBS Sunday Morning" on Facebook: https://bit.ly/3sRgLPG
Follow "CBS Sunday Morning" on Twitter: http://bit.ly/1RquoQb
Subscribe to our newsletter: http://cbsn.ws/1RqHw7T
Download the CBS News app: http://cbsn.ws/1Xb1WC8
Try Paramount+ free: https://bit.ly/2OiW1kZ

For video licensing inquiries, contact: licensing@veritone.com

CBS Sunday MorningCBS Newsnews