On September 11, 2001, Stanley Praimnath went to work on the 81st floor of the south tower of the World Trade Center, same as he always did. When a plane struck the north tower, Stanley and many others began their evacuation. But when he reached the lobby, he was told his building was safe and to return to work. He was back in his office minutes later when a plane hit the south tower and tore through his floor.