Ground Zero ceremony: How it'll begin, end

Former New York Rudolph W. Giuliani speaks during Former New York Rudolph W. Giuliani speaks during ceremonies for family and friends of 9-11 victims at Ground Zero. (Sept. 11, 2006) Photo Credit: Getty Images

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8:35 a.m. Program begins.

8:46 a.m. Mayor Michael Bloomberg calls for a moment of silence to mark the moment that the north tower was struck. Houses of worship toll their bells. President Barack Obama delivers reading. Relatives of 9/11 victims begin reading names.

9:03 a.m. Moment of silence to mark the time the south tower was struck. Former President George W. Bush delivers reading. Honor Guard opens family entrance, and families enter the Memorial Plaza.

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9:37 a.m. Moment of silence to mark time American Airlines Flight 77 struck the Pentagon. Gov. Andrew M. Cuomo delivers reading.

9:59 a.m. Moment of silence to mark time the south tower fell. New Jersey Gov. Chris Christie delivers reading.

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10:03 a.m. Moment of silence to mark time United Airlines Flight 93 crashed near Shanksville, Pa. Former Gov. George Pataki delivers reading.

10:28 a.m. Moment of silence to mark time the north tower fell. Former Mayor Rudy Giuliani and former New Jersey Gov. Donald T. DiFrancesco deliver readings. Reading of names continues.

1 p.m. Program ends.