Following 9/11, Guy Nordenson, on behalf of the Structural Engineers Association of New York, organized the building damage assessment by SEAoNY teams in September and October 2001. The initial inspections took place on 17 and 18 September and were published in a map on 21 September. Subsequent detailed and rapid inspections took place in September and October 2001. A book with accompanying DVD, World Trade Center Emergency - Damage Assessment of Buildings Structural Engineers Association of NY Inspection of September and October 2001 was published in 2003.