NEW YORK, May 19, 2011 /PRNewswire/ -- Attorneys representing families of 9/11 victims today are informing a federal court in Manhattan that they are filing comprehensive evidence that Iran played a key role in planning and facilitating the 9/11 attacks and called on the U.S. Government to declassify documents detailing what the U.S. intelligence community knew about Iran's relationship to al Qaeda prior to September 11, 2001.