USA Lacrosse is the national governing body of men and women's lacrosse in the United States. It provides a leadership role in virtually every aspect of the game and has more than 450,000 members throughout the United States, and offers programs and services to inspire participation while protecting the integrity of the sport. The USA Lacrosse national headquarters is located in Sparks, Maryland along with the Lacrosse Museum and National Hall of Fame. In addition, the headquarters campus features the IWLCA Building, Tierney Field and a memorial to the members of the lacrosse community that died in the September 11, 2001 terrorist attacks. USA Lacrosse also oversees the U.S. National Teams, which have won a combined 30 world championships.