The 911 Pin USPS 2001 Hero USA First Class Stamp Lapel Pins are collectible pinbacks made in the United States. These pins commemorate the heroes of 9/11 and are a tribute to the fire fighters and rescue teams who bravely responded to the tragic events of that day. The pins feature the iconic USPS First Class Stamp design and are a great way to pay respect to the memory of the victims and heroes of the 9/11 attacks.