Transcript of the first public hearing held by the National Commission on Terrorist Attacks upon the United States held March 31, 2003 at the Alexander Hamilton U.S. Custom House in New York City.This purpose of this hearing was to engage those whose lives were changed by the events of September 11 in a public dialogue about the Commission's goals. It includes opening remarks by the commissioners and city officials, in addition to testimony from survivors, representatives of the victims, and professionals from different fields about the attackers, intelligence, and counter-terrorism policy.