Stewart explains that elements of the World Trade Center were preserved, and the Pentagon was thoughtfully rebuilt:
"Thanks to the Department of Defense, skilled contractors labored tirelessly to rebuild the damaged wing of the Pentagon using material, design and craftsmanship that reflect its National Historic Landmark status. A beautiful memorial has also been constructed on the site of the crash. With help from federal programs like the now-defunct Save America's Treasures, meaningful ties to the World Trade Center have been saved, including the Survivors' Staircase (a 2006 11 Most Endangered listing and a 2009 Honor Award winner) and a 1:200 scale model of the complex."
Stephanie Meeks, President of the National Trust, also makes a statement in the article about the importance of historic preservation on 9/11.