The unique occasion of the Diamond Jubilee Celebration (DJC) has illustrated the diversity and unity of the Ismaili community, as well as their commitment to serve. As part of the DJC registration process, thousands of volunteers from all over the world came forward and expressed their desire to contribute their time and energy for this historic event. This photo gallery highlights volunteers in action at Parque das Nações in Lisbon, where the DJC is taking place this week, and will be updated throughout the week.