The main purpose of this legislation is to create commemorative coins to mark the 25th anniversary of the September 11, 2001, terrorist attacks in the United States. The coins will serve as a tribute to the victims and heroes of that day and will help support the National September 11 Memorial and Museum at the World Trade Center. Key provisions of the legislation include the minting of two types of coins: $5 gold coins and silver coins. The gold coins will be limited to 50,000 units, while the silver coins will be capped at 400,000.