Don't know about the nuclear plants, but if you see it again, an entomologist would probably be interested in documenting it since this website says the largest one in west Texas would only get about 4.3 inches long. (I'm assuming the range would not include Plano.)

Cool, but freaky! Get a picture with a ruler or something for scale if you get the chance!

Here is a link that might be useful: Dragonfly/Damselfly web page

What color was he? This is VERY interesting. I love dragonflies!!!

Texas' size dragonfly.....

Wow! Hope you can get a photo.

I too saw a giant Dragonfly. Just Saturday morning around 7:00. It was on my neighbors house, which happens to be about 50 feet from the window I was peering from, and close to her roofline, so it was a distance from my window. I ran outside to take a photo, and as I aimed to capture it my phone slipped from my hand, fell to the ground, when I looked up the Pterodactyl/Terodycty looking thing was gone! What caught my attention was the fact that this thing appeared HUGE from quite a distance away, so I know it was even larger close up, about like the size Lupinloon described!

Wow -- y'all have really got my interest up. I haven't seen "IT", but will be watching ...

Drone? ;-)

Could it have been a hummingbird moth? I've seen them in the DFW area; seriously thought it was a bird at first.
Look here: http://en.wikipedia.org/wiki/Hummingbird_hawk-moth