AP Photo/Carolyn Cole, Pool

In New York, Vasantha Velamuri, whose husband died in the World Trade Center, mourned at the memorial at ground zero.

The Boston Globe

A color guard files past 3,000 flags planted at a wreath-laying ceremony in the Boston Public Garden Sunday.

AP Photo/Michael Dwyer

Two women embrace during ceremonies in the Boston Public Garden in front of a memorial to Massachusetts residents who died on Sept. 11, 2001.

Pat Greenhouse/Globe Staff

Danielle (left) and Carie Lemack, whose mother, Judy Larocque, was on American Airlines Flight 11, place their hands on the Public Garden Memorial.

Pat Greenhouse/Globe Staff

Dignitaries pause after a wreath was placed in front of a memorial to fallen firefighters in Boston.

Win McNamee/Getty Images

Family members observe a moment of silence during a 9/11 remembrance ceremony at the Pentagon Sunday in Arlington, Va.

Photo by Win McNamee/Getty Images

In Arlington, Va., a mourner observes a moment of silence at the Pentagon's memorial ceremony.

PAUL J. RICHARDS/AFP/Getty Images

During the service in Arlington, a US military honor guard places flowers on benches in honor of the victims of the attack 10 years ago.

AP Photo/Mary Altaffer

Laura Bush, George W. Bush, Michelle Obama, and President Obama attend the National September 11 Memorial in New York City Sunday.

AP Photo/The Tribune-Democrat, John Rucosky

In Shanksville, Pa., Charlie and Jody Greene of Greenwich, Conn., seek their father's name.

Reuters/Cheryl Ravelo

A memorial is held in Manila for US citizen Marie Rose Abad, whose husband built 50 homes to remake a village there in 2004. The 9/11 victim's wish was to aid impoverished Filipinos.