WASHINGTON -- President Bush plans to deliver a speech to the nation from the Oval Office on Monday evening, the fifth anniversary of the Sept. 11 attacks, to reflect on what the terrorism strikes meant to the nation and to address what the United States still needs to do to fight terrorism, his spokesman said yesterday.

The 9 p.m. speech will conclude Mr. Bush's participation in two days of commemorations of the attacks, which reshaped his presidency as well as the nation's foreign and intelligence policies.

Before delivering the speech, Mr. Bush on Monday will take part in memorial ceremonies at all three sites where hijacked planes crashed on Sept. 11, 2001 -- in New York City, in Western Pennsylvania and at the Pentagon outside Washington.

White House press secretary Tony Snow said Mr. Bush's speech would avoid a partisan tone. "This is not a political speech. There are not going to be any calls to action for Congress."

On Sunday, Mr. Bush is scheduled to take part in two ceremonies in New York City: The presentation of a wreath at Ground Zero, where the World Trade Center towers stood, and a worship service at a nearby church. He is not likely to make formal remarks at either event, Mr. Snow said.

The next morning, the president will have breakfast with New York City emergency crews, observe a moment of silence at 8:46 a.m., when the first of two airplanes struck the trade center, and then take part in a formal commemoration of the attacks.

From New York, he will fly to Pennsylvania to visit the site near the town of Shanksville, in Somerset County, where United Flight 93 went down after passengers tried to seize control from the hijackers.

At midafternoon, he will present a wreath at the Pentagon, which was struck by a fourth airplane.

While in Shanksville, Mr. Bush will spend part of his time at the temporary memorial there, visiting with family members of the 40 passengers and crew killed while trying to overpower the hijackers. It is believed that the terrorists intended to fly on to Washington and crash the jet into either the U.S. Capitol or the White House.

Ben Wainio of Catonsville, Md., whose daughter, Elizabeth, 27, died in the Shanksville crash, hopes that the president's visit will bring more recognition to the people on Flight 93. "This isn't about politics," he said. "I look at it as the office of the president coming to honor my daughter and the other 39 passengers and crew."

Speakers scheduled for Monday's program include Pennsylvania's Democratic Gov. Ed Rendell; Sens. Arlen Specter and Rick Santorum, both R-Pa.; U.S. Rep. Bill Shuster, R-Blair; retired Gen. Tommy Franks, honorary chairman of the Flight 93 Memorial capital campaign; and Hamilton Peterson, president of the Families of Flight 93.

Former U.S. Homeland Security Secretary and Pennsylvania Gov. Tom Ridge will be the featured speaker.

This year's ceremony, like those in the past, will be solemn and understated, said Joanne Hanley, superintendent of the Flight 93 National Memorial. "The families really feel this is about honoring their loved ones," she said. "If we did nothing more than read the names and the tolling of the bells, that in itself would be sufficient. This is about remembering, not being fancy."

To mark the fifth anniversary, the National Park Service, which runs the memorial site, is expecting about 300 family members -- more than triple the number in recent years.

The public is invited to attend Monday's ceremony, which begins with the U.S. Army Brass Quintet performing at 9:15 a.m. There will be a moment of silence at 9:59 a.m., and the reading of the names will begin at 10:01 a.m. Mr. Ridge will speak at 10:15.

In addition to the ceremony in Shanksville, those who died on Flight 93 will be honored at other local events Monday:

The Pirates home game against the Milwaukee Brewers at 7:05 p.m. will feature a program with more than 50 Flight 93 family members; a video tribute to those killed; and U.S. armed forces members unfurling a 60-by-90-foot American flag, sewn by students in Palatine, Ill.

Indiana University of Pennsylvania will host a program at 8:40 a.m. in the university's Oak Grove, in front of Stapleton Library. It is to include a remembrance of IUP alumni lost at the World Trade Center: Donald Jones, class of '80; William Moskal, class of '79; and William Sugra, class of '93. IUP President Tony Atwater will speak.