Pope Francis arrives in Iraq on Friday, fulfilling a Jubilee Year desire of St. John Paul II to visit Ur of the Chaldees as part of his millennial biblical pilgrimage. Saddam Hussein would not permit the visit in 2000. In the intervening years, the situation of the Christians in Iraq has become quite dire. Pope Francis will arrive to comfort them, strengthen their witness, and advance one of his signature initiatives: the "Human Fraternity" project he launched in the United Arab Emirates two years ago.