Cambridge responded to last Tuesday’s attacks on the World Trade Center and the Pentagon in a variety of ways. (Above Left) Loudis Osis and Major Clifford Yearwood of the Cambridge Salvation Army were out on Massachusetts Ave. collecting money for relief programs Friday. (Above Right) Members of the Scientology Church held a candlelight vigil and choir on Friday evening at the intersection of Massachusetts Avenue and Beacon Street in Boston. The vigil was one of many around the Boston area. (Right) The Great Dome was mysteriously adorned with a United States flag Monday morning. An earlier attempt to place a flag on the dome was hampered by rain.