A Layman's Guide to the High-Tech Tents That Keep Secrets Secret

It seems like every day brings a new "revelation" about Allied nations spying on other Allied nations. But while friends spying on friends might not be a huge surprise, the US is spending tons of money and brainpower trying to protect its sensitive conversations—in part, using portable security "tents." » 11/11/13 3:40pm 11/11/13 3:40pm