Intelligence officials head back to Capitol Hill Thursday for hearings on NSA's collection of phone and internet data, but Wednesday FBI director Robert Muller admitted the agency's use of drones for domestic surveillance.
During questioning lead by Iowa Senator Charles Grassley, Muller was quick to say the drones are used very rarely. However, there are currently no rules in place to protect citizens' privacy, but Muller says rules are currently being written.
The FBI's drones are small, model-airplane sized aircraft, and are unarmed. They were used earlier this year, in a six-day standoff in Alabama, where a 5-year-old boy was held hostage in an underground bunker.
The use of drones worldwide is on the rise. The Aerospace Industry forecasts there will be 30,000 drones in the skies in the next five years, with the U.S. accounting for roughly half of them.
During Wednesday's hearing, Muller urged Congress to think twice before making changes to the phone and internet surveillance programs.
"If we are to prevent terrorists attacks, we have to know and be in their communications," Muller said.