Federal Hall was closed for one month following the September 11, 2001, attacks, which caused the nearby collapse of the World Trade Center's Twin Towers. On September 6, 2002, approximately 300 members of the United States Congress traveled from Washington, D.C. to New York to convene in Federal Hall National Memorial as a symbolic show of support for the city, still recovering from the September 11 attacks. The meeting was the first by Congress in New York since 1790.