Even though some of the pics fit. If someone is going to be that accurate drawing the plane, I've got to assume that he's accurate with the ratio of the "towers" to the body of the building and/or whatever it is.
I tend to agree that it more likely represents a nuke plant.
I still think the upper right corner of the right tower bears the letters TX.
It does look like a nuke plant. However, someone had debunked the theory about hitting nuke plants. They said hitting a NP with a plane will not cause a nuclear (sp) explosion.
What is the landmark that you think of when you think of Houston?
What if the pic is symbolic in nature, meant purely to define the target city?
It may be that the plane is symbolic as well, representing "attack".
Just off the 'top of my head' so to speak, the drawing appears to me to be the product of a juvenile fascinated with drawing aircraft. He's been practicing, but can't draw much else. The drawing itself shows an aircraft about to fly into the bottom span, or beneath the bridge...and he's better at drawing aircraft than bridges, that's for sure. Muslim teenage wish fulfillment. Probably lives in Sydney! TX? Finished the picture with his initials maybe?
I hadn't seen the TX, please repost pic?