Isn’t it a fact that international arrival passengers at IAD mainly still get deplaned by the moon buggies? If that is false, that is news to me.

If you want choke points language to only be used when there is a bottle neck that catches every passenger deplaning any and every given plane at IAD, then it’s not where you mention above; rather it’s at each of the individual plane’s doors being used by deplaning passengers at IAD. [I said choke-points — in the plural — for a reason.] But CBP at IAD isn’t staffed to be able to do that for all IAD arrivals without causing what may be costly delays for no good reason. I wouldn’t be surprised if they are still well under 300 CBP employees assigned there full time to deal with the full load of IAD-using passengers and goods entering and exiting the country over the course of the year and all that involves. And so sampling, surveying, random selection and targeted selection will be part of the array of tools used by CBP for very logical reasons that don’t exempt GE members.

Doing this screening at different choke points — or “bottle necks” of sorts if you wish for that language instead — as a layer to try to mitigate for the risk from a threat vector at a port of entry is a logical use of resources in a world where resources are constrained and it’s not certain which individual or individuals are posing the threat and when they are posing a given threat. In many cases, it may not even be certain knowledge to the carrier passenger that the passenger is a carrier of a targeted disease or is a carrier of more radioactive material than average. Absolute containment may be considered too costly in the absence of there being an identified clear and present danger in the form of an already identified carrier person.

GE members do sometimes also get subjected to checks for radioactivity or fevers. It’s not new, and it will continue to happen without there being “absolute containment” since GE won’t be left to be an absolute leak in a world where CBP resources are limited.