In 1983, Mary Cassini attended a Silent Vigil for Peace. It gave her an idea that changed her life. She decided that at 11 am local time around the world people should stop and share three minutes of silence to be mindful of the future and wish for peace. Doing the Impossible is the remarkable story of how she achieved this, travelling the world meeting ordinary citizens and global leaders, in the East and the West, Russia and the Middle East, spreading awareness of her message and making her dream a reality. Her initiative, 3 Minutes World Silence, was accepted around the world and is helping us all to understand that we, as fellow human beings, can share this planet peacefully.