"A transrectal ultrasound (TRUS) is an ultrasound technique that is used to view a man's prostate and surrounding tissues. The ultrasound transducer (probe) sends sound waves through the wall of the rectum into the prostate gland, which is located directly in front of the rectum."
Now look at Ted Cruz' logo again...
Can't take credit for discovering that. It was sent to me by "JF", who found it at the Daily Kos. I make no political judgements. Just thought it was funny.
