Upon arriving at the airport, Hetfield was detained and questioned but after explaining who he was and what he was there for, airport officials let him go. London, of course, has been a bit jittery after several recent failed terrorist attacks and Ayman al-Zawahiri's recent pronouncement that he wants to rain terror on the Infidels for "St. Anger." The CIA has noted that in one of his taped speeches sent to Al Jazeera, Al-Zawahiri mentioned that Metallica should have quit after Cliff Burton died and blamed "the Zionist conspiracy."