When You Think They Can't Get Any Crazier

They go out and do it:

In the case of the WTC, the criminals spilled the beans in episode 52 of “Get Smart,” entitled “Smart Fit the Battle of Jericho” (whatever that means) which was initially aired on Saturday, February 18, 1967 at 8:30 P.M. on NBC. In this episode, a Kaos front, the Joshua Construction Company, is run by Kaos agent Frank Lloyd Joshua. Their buildings have a bad habit of blowing up. The Chief, head of Control, gives Smart his orders to infiltrate the company and find out how they were hiding nitroglycerine used to blow up the buildings. I was still half-asleep and had failed to grasp the episode’s significance until the point where Smart infiltrates a construction site and picks up a brick, only to discover it is hollow. He then realizes that they were hiding the nitroglycerine in the hollow bricks. After seeing this, it hit me like a ton of (nitro-filled) bricks, “Of course, they blew up the WTC by putting explosives in during construction!”

Granted, this is five years old, but it's the first time I've seen it. Hat Tip to commenter 911 Truthiness for digging it up. Simply amazing!