British lawmakers will question the editor of the Guardian newspaper next month over publishing intelligence files from U.S. spy agency contractor Edward Snowden after warnings from security chiefs that the leaks damaged UK national security. Alan Rusbridger will appear before the House of Commons home affairs select committee. Disclosures about the activities of Britain's GCHQ eavesdropping agency and its close cooperation with the U.S. National Security Agency, have embarrassed Prime Minister David Cameron and angered lawmakers in his ruling Conservative party who say they have compromised national security.