In 2001, apparently unrelated to the specific attacks of 9/11, muslim men were bribing state officials to get HAZMAT licenses. Now, maybe hzmat truckers get paid more, and maybe Danny THomas’ muslim cousins all decided to skip show business and drive trucks, but it was odd. It was a multi-state bribery ring.
I remember a story years after 9-11, about the same kind of thing. It created a sizeable media-generated scare, and then it just disappeared.