Former National Security Agency contractor Edward Snowden, and one of the reporters who first broke the news of Snowden's documents, Laura Poitras, received a Ridenhour Truth-Teller prize [on April 30] to a standing ovation at the National Press Club. Snowden leaked classified documents that exposed the NSA's massive global surveillance programs. Snowden ... compared his actions with that of Director of National Intelligence James R. Clapper, who denied that the NSA was wittingly" collecting data on millions of Americans in a Senate Intelligence Committee hearing last spring -- a claim at odds with revelations about domestic phone records collection as a result of documents provided by Snowden. "The oath that I remember is James Clapper raising his hand, swearing to tell the truth and then lying to the American public," Snowden said. "I also swore an oath, but that oath was not to secrecy, but to defend the American Constitution." While Clapper has accused Snowden of perpetrating the most "massive and damaging theft of intelligence" in U.S. history, Snowden argues his actions were serving a larger public interest that superseded the national intelligence need for secrecy. Later in the speech, he described Clapper as having "committed a crime by lying under oath to the American people," and questioned why charges were never brought against the director. By contrast, Snowden said, charges were brought against him soon after he revealed himself as the source of the leaks.