LEWISTON, Maine - At Bates College, Sept. 11 begins with a Slow Walk for Peace, the contemplative ascent of a wooded hill near campus. Bells signal a moment of silence at 8:46 a.m. and a Memorial Gathering in the College Chapel is planned for evening. Interpretive events later in the month include a faculty panel discussion and, on Sept. 25, the lecture "Is Islam the Enemy?" by The Nation columnist Christopher Hitchens.