The NSA’s TAO hacking unit is considered to be the intelligence agency’s top secret weapon. It maintains its own covert network, infiltrates computers around the world and even intercepts shipping deliveries to plant back doors in electronics ordered by those it is targeting.

In January 2010, numerous homeowners in San Antonio, Texas, stood baffled in front of their closed garage doors. They wanted to drive to work or head off to do their grocery shopping, but their garage door openers had gone dead, leaving them stranded. No matter how many times they pressed the buttons, the doors didn’t budge. The problem primarily affected residents in the western part of the city, around Military Drive and the interstate highway known as Loop 410.

In the United States, a country of cars and commuters, the mysterious garage door problem quickly became an issue for local politicians. Ultimately, the municipal government solved the riddle. Fault for the error lay with the United States’ foreign intelligence service, the National Security Agency, which has offices in San Antonio. Officials at the agency were forced to admit that one of the NSA’s radio antennas was broadcasting at the same frequency as the garage door openers. Embarrassed officials at […]