Sept. 11 marked with reading of nearly 3,000 names

President Barack Obama and first lady Michelle Obama, former President George W. Bush and former first lady Laura Bush bow their heads during a moment of silence at the Sept. 11 10th Anniversary Commemoration Ceremony at Ground Zero in New York, Sunday, Sept., 11, 2011 in New York. (Pablo Martinez Monsivais)

September 11, 2011 12:00:00 AM PDT

By SAMANTHA GROSS and LARRY NEUMEISTER

NEW YORK --

The names of the Sept. 11 dead, some recited by children barely old enough to remember their fallen mothers and fathers, echoed across ground zero Sunday in a haunting but hopeful tribute on the 10th anniversary of the terror attack. "Hope can grow from tragedy," Vice President Joe Biden said at the Pentagon.