Tributes to 9/11 victims across the U.S.

Associated Press
U.S. deputy Secretary of State William Burns, left, shakes hands with Libyan President Mohammed el-Megarif during a memorial service in Tripoli, Libya, Thursday, Sept. 20, 2012, for U.S. Ambassador to Libya, Chris Stevens, and three consulate staff killed in Benghazi on Sept. 11. The deputy U.S. secretary of state has met senior Libyan officials in Tripoli and attended a memorial service for the American ambassador and three consulate staffers killed in an attack last week. William Burns is the most senior US official to visit Libya in the aftermath of the Sept. 11 attack on the consulate in Benghazi and comes as Washington is still working to piece together how its top diplomat there, Ambassador Chris Stevens, was killed. (AP Photo/Abdel Magid al-Fergany)

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Tributes were held around the country for the 10th anniversary of the Sept. 11 terrorist attacks on the U.S.

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