The heads of Britain’s three spy agencies faced questions before the British Parliament Thursday about surveillance practices revealed by Edward Snowden, including collaboration with the U.S. National Security Agency. Sir John Sawers, head of MI6, claimed Snowden’s leaks have caused damage.

John Sawers: “The leaks from Snowden have been very damaging. They’ve put our operations at risk. It’s clear that our adversaries are rubbing their hands with glee. Al-Qaeda is lapping it up.”