The NSA’s top attorney has contradicted longstanding claims by the nation’s leading technology companies that they were unaware of bulk government spying on their servers. Speaking before the Privacy and Civil Liberties Oversight Board, NSA General Counsel Rajesh De said the companies have offered full cooperation to bulk Internet spying programs. De said the firms — including Apple, Google and Facebook — may only have been unaware of details like the operation’s codename, PRISM. The companies have denied knowingly aiding government spying since leaks from Edward Snowden disclosed PRISM last year.