Open Doors International (ODI) originated in 1955, when a young Dutchman started smuggling Bibles to the persecuted Christians in Communist Europe. He became known as Brother Andrew, and in the six decades since his first journey, Open Doors has continued to seek out and strengthen those who suffer violent persecution and discrimination for their Christian faith. With the aid of the international community, Open Doors is serving persecuted Christians in more than 70 countries, working with churches and local partners to provide prayer, Bibles, Christian materials, training, livelihood skills and advocacy. ODI is known for its annual World Watch List, the ranking of the top 50 countries where Christians face the most extreme persecution. Open Doors US is one of 25 national ODI bases located around the world.