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Memorial service set for Ground Zero

NEW YORK (CNN) -- A memorial service is planned for Sunday at the site of World Trade Center disaster in New York for families of those whose loved ones died in the September 11 terrorist attacks.

"The focus of this will be prayer and song for the families who lost people at the World Trade Center," New York Mayor Rudy Giuliani told reporters Saturday.

Some of those participating in the memorial service will be Rev. Franklin Graham, Renee Fleming of the Metropolitan Opera, and composer Andrew Lloyd Webber.

According to the mayor's office, 4,167 people remain missing after the World Trade Center collapsed following the terrorist attacks. Of the 506 bodies recovered, 454 have been identified.

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Giuliani said some 2,000 people are expected to attend. He acknowledged it might be difficult for some family members to be at Ground Zero.

"That area, the World Trade Center, is now a burial ground of very, very large proportions," he said. "For some people it is very comforting being there, for others it may not be of comfort."

Earlier in the day, Giuliani threw his support behind Republican mayoral contender and businessman Mike Bloomberg. He said Bloomberg can best guide the city in the wake of the terrorist attacks.

"I think he has an understanding of the economy, he has an understanding of the things that need to be done to continue to make New York City safe," Giuliani said. "I think he is particularly suited for a time when the mayor needs to know about international politics and the world."

Bloomberg also has picked up the endorsement of New York Gov. George Pataki.