A troupe of demonstrators circled the Cathedral of Learning Tuesday, to protest U.S. military intervention in Afghanistan and Iraq. The day marked the two-year anniversary of the United States' first bombings in Afghanistan, which launched the current military campaign against terrorism. Local activist groups, the Thomas Merton Center and the Pittsburgh Professors for Peace and Justice, organized the march. "[What] we are here to show is that we are still vigilant," said Tim Vining, executive director of the Merton Center "We are watching what is happening in Iraq and it has become clearly an occupation and is not about liberating...