25th Anniversary of 9/11 Commemorative Coin ActThis bill directs the Department of the Treasury to mint and issue coins to commemorate the 25th anniversary of the September 11, 2001, terrorist attacks on the United States and the establishment of the National September 11 Memorial and Museum at the World Trade Center.The sale of all coins issued under this bill must include a surcharge to be paid to the National September 11 Memorial and Museum at the World Trade Center to support operations and maintenance. However, if the issuance of this commemorative coin exceeds certain annual limits, no surcharge may be included.