Osama Bin Laden death: Reflections at Ground Zero
2 May 2011 Last updated at 16:48 BST
Al-Qaeda founder and leader Osama Bin Laden has been killed by US forces in Pakistan.
People have been gathering at Ground Zero in New York to mark the occasion.
Laura Trevelyan spoke to Charles G Wolf, who lost his wife in the September 11 attacks, and Joe Daniels, President of the 9/11 Memorial at Ground Zero.