Stephen Siller Jr., whose New York City firefighter father died on 9/11, has spent the last four months displaying a massive steel beam from the World Trade Center's south tower across the country as a symbol of what was lost in the attacks. CBS News chief Washington correspondent Major Garrett spoke with Siller about the "Steel Across America" campaign.

Original source: https://www.cbsnews.com/video/911-victims-son-honors-father-tunnel-to-towers-foundation/