INTELLIGENCE: "National Security Agency [NSA]- Once so secret it was referred to as 'No Such Agency,' the NSA is the largest and perhaps most technologically sophisticated of all the intelligence agencies. It focuses on signals intelligence — monitoring, collecting and processing communications and other electronic information — and cracking secret codes. It also protects U.S. information systems from outside penetration. The NSA oversees PRISM and other mass surveillance programs revealed by Edward Snowden in 2013. It is believed to employ more mathematicians than any other organization in the country — a fact not all math whizzes are happy about."
– “There’s more than the CIA and FBI: The 17 agencies that make up the U.S. intelligence community,” The Los Angeles Times online, Jan 17, 2017, Nina Agrawal, 1/17/2017