The United States doesn’t have the monopoly on a category of weapons called Less Than Lethal(LTL). There are a range of production LTL weapons that are used fo

The United States doesn’t have the monopoly on a category of weapons called Less Than Lethal(LTL). There are a range of production LTL weapons that are used for riot control that use directed/focused microwave transmitters. It’s not unreasonable to think that US adversaries have developed similar LTL weapons. Many small/portable systems exist for use by the military/police/secret service to disrupt UAVs up to several kilometres away. It’s within the realm of possibility that an adversary of the US is applying some form of LTL weapon in certain locales. There is also a theoretical possibility a substance used to mark known/suspected intelligence officers could cause the reactions described. This is based on the 80’s era KGB “Spy Dust” marking agent story. Perhaps such substances have evolved in both capability and side-effects.