"Aerial drones are now used by the Texas Department of Public Safety; the Mesa County Sheriff's Office, Colorado; the Miami-Dade County, Florida, Police Department; and the Department of Homeland Security. But what about privacy concerns? 'Drones raise the prospect of much more pervasive surveillance,' said Jay Stanley, a senior policy analyst with the American Civil Liberties Union's Speech, Privacy and Technology Project. 'We are not against them, absolutely. They can be a valuable tool in certain kinds of operations. But what we don't want to see is their pervasive use to watch over the American people.'"