On that terrible day 20 years ago, September 11th, 2001, countless Heroes emerged.

Some wore police, fire, or military uniforms.

Some will be forever anonymous.

But many were just ordinary Americans. Like Todd Beamer, a passenger aboard United Airlines flight 93.

Their plane was already in the air that morning when the other planes went into the World Trade Center and the Pentagon.

And as the passengers learned what was happening, terrorists took over there playing. And soon, a group of passengers formed a bold and audacious plan to take over the plane and support the terrorist plot to slam that playing into the US Capitol or the White House.