September 11, 2001, is a date the world will never forget. The terrorist attacks of 9/11 changed America, and indeed the world, as we knew it. New laws were passed, military force was used, and new regulations were introduced—all in an attempt to improve security and prevent future terror attacks. But what if the World Trade Center was never attacked by terrorists? What would have happened if the Twin Towers were still part of Manhattan's skyline?
In this gallery, we speculate about what would (and would not) have happened if 9/11 was just another bygone date on the calendar. Click on for what's sure to be an interesting read.