Nearly a thousand protestors, sponsored by one hundred public advocacy groups, marched on the Capitol in Washington, D.C. to rally against the National Security Agency’s mass surveillance sweeps on Saturday.

“Why are we here?” former NSA executive and whistleblower Thomas Drake asked the gathered crowd. “We’re against mass surveillance!”

Drake, who was prosecuted by the Department of Justice under the Espionage Act for leaking unclassified information to a Baltimore Sun reporter, declared that the government “tried to bankrupt me, silence me and imprison me,” and that he was fortunate not to end up in prison.