The Tunnel to Towers Foundation is transporting a steel beam recovered from the South Tower on the final stretch of a 10,500-mile journey across America, bringing a piece of Ground Zero to communities across the nation in remembrance of the 9/11 attacks as the 25th anniversary approaches."This tour is about ensuring that every generation can remember, and truly understand, what happened 25 years ago," said Tunnel to Towers Foundation chairman and CEO Frank Siller said in a press release of the campaign.The 16,900-pound, 21-foot steel beam from the South Tower will travel to over 20 different s...