U.S. Marks 9/11 With Solemn Remembrance

Four years after, victims remembered in ceremonies at Ground Zero and across the nation

And in southwestern Pennsylvania, about 1,000 people attended a memorial service in the field where Flight 93 crashed after it was hijacked by terrorists.

''The first heroes of 9/11 were here,'' said Brian Rohrbaugh, who brought his wife and young children to remember the 40 passengers and crew who died as they struggled with hijackers for control of the plane.

Parents and grandparents read the victims' names at ground zero last year, while children's voices were heard in 2003. A selection of politicians, relatives and others read the names on the first anniversary.

Two light beams inspired by the twin towers shot skyward Sunday night in an echo of the towers' silhouette. The ''Tribute in Light'' will fade away at dawn Monday.

(c) 2005 Associated Press