7.5M views · 65K reactions | The World Trade Center towers were once the tallest buildings in the world. But on 9/11, after being struck by a terrorist attack, they collapsed. Two scientists have thought of a new theory, which may finally explain what happened on that tragic day. The Missing Evidence: 9/11 Secret Explosions in the Towers airs tonight at 10 PM. | Smithsonian Channel | Facebook

Did you know there is a piece of the Original World Trade Center subway station inside one of NYC’s newest stations? Underneath the original World Trade Center site was a subways station. When the twin towers fell, they destroyed five other World Trade Center site buildings, and the train station below. However, part of the train station was preserved and built into the Oculus! If you know where to find it, you’ll find a preserve wheelchair ramp, preserved signage, preserved stones, and then a d