Since Edward Snowden blowed the whistle about the NSA's alleged PRISM program, tech companies like Facebook, Microsoft, Yahoo, and Apple have released statements to clarify their stance as far as privacy is concerned.
Now, the U.S. goverment is saying that NSA programs like PRISM prevented terrorist plots in at least 20 countries. Top intelligence officials also revealed that the data they have gathered from such programs are usually destroyed every five years and that NSA programs are reviewed every 90 days by a secret court authorized by FISA or the Foreign Intelligence Surveillance Act.
According to the terms, data such as calls can only be examined for suspected connections to terrorism. The aim here is simple: to show the real value of such programs. Officials, however, were careful not to reveal too much information, particularly the agency's plans for counterterrosrism.
Source: Associated Press