How to tell if a target is 'foreign'
This is an excerpt from a National Security Agency training manual explaining how to determine if a targeted device is "foreign." It highlights a query for the previous 60 days using the CHALKFUN location tool, which found "no roaming in the U.S." NSA tracking cellphone locations worldwide, Snowden documents show
GRAPHIC: Ashkan Soltani and Matt DeLong - The Washington Post. Published Dec. 4, 2013.