In this photo made Aug. 18, 2011, Boston University assistant men's hockey coach Mike Bavis reacts in his office on the schools campus in Boston as he remembers his twin brother, Mark, who was killed ... more 
In this photo made Aug. 18, 2011, Boston University assistant men's hockey coach Mike Bavis reacts in his office on the schools campus in Boston as he remembers his twin brother, Mark, who was killed on United flight 175 when it crashed into the World Trade Center on Sept. 11, 2001. Mary Bavis believes there are still more to blame for the death of her son Mark _ more who have not been punished, or held accountable, or even publicly identified. (AP Photo/Stephan Savoia) less 
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Associated Press | Photo By Stephan Savoia
Fri, Aug 26, 2011 11:54 AM EDT