ST. LOUIS (KMOX) - A group that has questions about the government’s official version of the September 11, 2001 terror attacks is putting its name on Adopt-a-Highway signs.

Drive along Olive Boulevard between Lindbergh and Old Bonhomme in Creve Coeur and soon you will see signs that say “St. Louis 9-11 Questions Meet Up Group.”

Group organizer Donald Stahl has questions that suggest the Twin Towers were brought down by a controlled demolition.

“If they fell down, why are there so many photographs and videos of these huge parts of them going up? Things don’t fall up,” Dahl said.

Stahl’s group also has questions about the Shanksville, Pennsylvania crash site, where he says United 93 “went straight into a hole” which was already there. He also questions the Pentagon attack, asking why the damage wasn’t larger to show where wing-mounted engines would have hit and alleging that a missile hit the military complex instead.

The Missouri Department of Transportation said the signs are scheduled to go up by January 1st, 2013.