Sen. Paul: Intel community has "credibility gap"

FBI director Robert Mueller admitted Wednesday that the agency has used surveillance drones within the U.S.

Mueller made clear - this is happening on U.S. soil.

FBI uses drones in U.S., says Mueller

The FBI already acknowledged using unmanned surveillance aircraft earlier this year to monitor the situation where a boy was held hostage in a bunker in Alabama.

But we don't know how often these drones are being used. Or whether your rights are being violated.

Outfront tonight: Republican Senator Rand Paul - he sits on the Homeland Security Committee.