Social media has changed the world, but has opened huge exposures for national security. With "Digital dust" trails, intelligence officers are vulnerable in many ways. CIA recruiters even found that the questions they asked in the interview are being posted online by candidates. But it is also helping investigators to solve cases using social media. Investigators are using social media even in undercover, covert and even in internal security operations. It is being suggested that some guidelines should be maintained for men and women who serve over country for social media utilization. To know more, please read the article by Philip Ewing (Writer at NPR) -: http://www.npr.org/2016/02/24/467933392/why-the-cia-likes-and-dislikes-social-media