Did 9/11 Change the Way We Build?

When hijacked planes slammed into New York's Twin Towers, the skyscrapers crumpled with devastating speed. Ten years later, America has rigorous new construction laws. Did 9/11 change the way we build?

Interestingly, a century-old skyscraper near Ground Zero suffered only minor damage when the Twin Towers fell. PBS Newshour reports: How Has Skyscraper Design Changed Since 9/11?

Also see: Why Did the Twin Towers Fall?

^{Illustration: Proposed in 2002, this version of Freedom Tower never made it past the drafting board. Rendering by dbox, inc. via Getty Images}