In New York at 9.30 am local time on Sunday 20 April 2008, the Pope visited Ground Zero, the name now used to refer to the site once occupied by the twin towers of the World Trade Centre. He prayed for peace and an end to hatred.
Human rights groups and critics of extra-legal detention and the 'war on terror' have expressed deep concern about the proposed trials of Guantanamo Bay detainees on charges related to the 9/11 attacks in the USA.
It was six years ago this month, but some scars do not heal quickly. The two planes came out of a perfect September morning sky, and nothing at all could have prepared the world for what followed - writes Giles Fraser of the anniverary of 9/11.
The religious basis of peace, non-violence and reconciliation in a plural world was one of the main discussion points at a recent meeting of faith leaders in the light of the fifth year anniversary of the 9/11 attacks on the World Trade Centre in New York.