The members of the United States Secret Service are certified badasses. I can recall one altercation I had with them, it was here in Austin actually. The President was coming to town and staying at a hotel next door to HQ and the secret service showed up the day before to “check out” our spot. At the time I had no idea who they were just a bunch of random burly guys looking in every nook and cranny of the space. What threw me off was their civilian clothing. That is until one of them came up to me while I was working and handed me a challenge coin. He was a big fan of the site and I was then a big fan of his.
So yeah, they take their jobs seriously and use code names for security purposes. Here are some of the more popular ones.