Not all isotopes have anything to do with nuclear radiation. There are isotopes of almost all elements. So a “high isotope reading” per se has nothing to do with nuclear radiation. But no one expects an agent of the government to know that. If he had asked about nuclear radiation, that would be another thing.
On the plus side, it’s good to know that they have such sensitive devices.
On the minus side, the media acted as they always do, calling it a “nuclear scare.”
There must have been a reason they were on the look out for an nuclear reading...
Dollars to donuts they were on alert for an something entirely different reason and this guy simply was at the wrong place at the wrong time...
I unfortunately had to ride the Metra trains when I worked at Sears Tower for about six months years ago... nothing, and I do mean NOTHING, the Metra does should EVER have the word "elite" in front of it.