On September 11, 2001, four hijacked commercial aircraft crashed into the World Trade Center (WTC), the Pentagon, and a Pennsylvania field, killing nearly three thousand people and the nineteen hijackers. On July 7, 2005, four bombs exploded on London's public transport system killing fifty-two people and the four suicide bombers. This essay examines the British reaction to the 9/11 attacks, British and American reactions to the 7/7 bombings, and the relationship between the two. Both events and their reactions are analyzed comparatively to provide critical commentary on governmental and popular relations between the United States and the United Kingdom. The central objective is to provide a greater historical understanding of this bloody opening decade of the twenty-first century, together with ideas to prevent its repetition in the second decade.