SPARKS, Md. — US Lacrosse will celebrate the opening of its new national headquarters with a Grand Opening Weekend on Sept. 10-11. The weekend festivities include the National Lacrosse Hall of Fame induction ceremony on Sept. 10, and a lacrosse triple-header on Sept. 11 featuring both the U.S. men’s and women’s national teams, and special exhibition between the lacrosse teams from the Fire Department of the City of New York (FDNY) and the New York City Police Department (NYPD).