9/11 25th anniversary live updates: Families gather for ceremonies at World Trade Center, Pentagon, Shanksville

ABC News Chief Global Affairs Correspondent Martha Raddatz was reporting from the State Department and her husband, also a journalist, was at the Pentagon on 9/11.

When the Pentagon was attacked, Raddatz said she and her cameraman walked to Memorial Bridge where they saw the flames shooting out of the building.

“By then I knew which side of the Pentagon had been hit, I knew my husband was on the other side. I just felt like I knew he was OK,” she said. “But to watch from Memorial Bridge, where we were all day, and imagine that that fourth plane was going to hit the Capitol, the White House. I could hear the panic in our people from the White House. ... Fighter jets going down the Potomac River and just streams of men and women in uniform crossing into Washington, D.C... to get ready for whatever they needed to get ready for.”

“Good Morning America” co-anchor George Stephanopoulos shared a video from the moment he and other journalists were evacuated while covering the collapse of the World Trade Center.

Former President George W. Bush posted his artwork of several famous images from 9/11 on his Instagram page Friday.

The paintings include a recreation of the image when Bush was told about the attacks during a visit to a school, and the unfurling of the U.S. flag outside the Pentagon on Sept. 12, 2001.

"Twenty-five years ago, the actions of an enemy revealed the spirit of the American people. These and other paintings are my reflections of this solemn anniversary and will be on display all month at [The George W. Bush Presidential Center]," he said in his post.

Bush reflected on the anniversary during a conversation with former Secretary of State Condoleezza Rice Wednesday.

"9/11 was a clarifying moment for me and you and others in our administration because they realized that we were vulnerable to attack based upon what we believe," he said.

A new art installation at the 9/11 Memorial & Museum comes from the hearts and minds of children who lost a parent or sibling on 9/11.

The installation, a papier-mâché sculpture titled "The Feathers of the Phoenix," is composed entirely of artwork from the children at America's Camp, a free, weeklong camp that hosted the children of 9/11 victims every summer in the Berkshires for 10 years, closing as planned in 2011 on the tragedy's 10th anniversary.

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