title: Pope says world should condemn 'very possession' of nuclear weapons
text: VATICAN CITY (Reuters) - Pope Francis, in some his strongest comments ever on nuclear weapons, said on Friday that the world should condemn not only their possible use but  their very possession . The appeal came at the start of a two-day conference on nuclear disarmament that has brought together 11 Nobel Peace Prize winners, as well as United Nations and NATO officials, discussing prospects for a world free of nuclear weapons. Addressing the group, Francis spoke of  the catastrophic humanitarian and environmental effects of any employment of nuclear devices  and added:  If we also take into account the risk of an accidental detonation as a result of error of any kind, the threat of their use, as well as their very possession, is to be firmly condemned.   