911 memorial remembering nyc ground zero liberty towers 1 20110912

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Politicians banned from this year's Sept. 11 ceremony

Move comes amid concerns from victims' families that event is too politicized

9/11 museum delayed over dispute between Bloomberg, Cuomo

The 9/11 museum remains unfinished as Mayor Michael Bloomberg and Governor Andrew Cuomo continue to argue over costs.

Memorial Services for 9/11

911 memorial remembering nyc ground zero liberty towers 1 20110912

Robert Peraza, who lost his son Robert David Peraza, pauses at his son's name at the North Pool of the 9/11 Memorial during the 10th anniversary ceremonies at the site of the World Trade Center on Sept. 11, 2011.

Justin Lane

AFP/Getty Images