(Editor's note: The Columbia University community joins our fellow New Yorkers and people around the world in remembering those who lost their lives on Sept. 11, 2001.

As the city, nation and world pause to remember the 10th anniversary of the destruction and heroism that will forever mark lower Manhattan, the Pentagon and Shanksville, Pa., Columbia University is commemorating the occasion with a range of programs rooted in its mission as a place of lear

Dr. Sandro Galea is a leading researcher of mass trauma.

Out of the wreckage of the World Trade Center attacks and the events of 9/11 came some of the first large-scale research of mass trauma.