“The War on Terror is meant to protect us from those who want to do us harm, and that’s a good thing. But its methods are a murkier issue. British photographer Edmund Clark is among the artists (and journalists) goading us to ask a lot more questions about those methods, and their effects on society, culture and our democratic ideals. The International Center of Photography is currently exhibiting work from his various projects about the War on Terror in a show titled “Edmund Clark: The Day the Music Died.””