

We have military bases in Taiwan
The US does not have military bases in Taiwan anymore - not since the US switched diplomatic recognition from the ROC to the PRC in 1979 - one of the concessions to the PRC was the removal of US military presence from Taiwan.
Didn’t the original full body scanners used at airports use backscatter X-rays, which are ionizing radiation ?
I believe these were mostly replaced by millimeter-wave scanners, and are not used anymore (even banned in some countries) but a lot of the initial pushback and debate surrounding the scanners when they were first introduced was about potential health risks of repeated X-ray exposure from those scanners, and so the idea of ionizing radiation exposure persists to this day in many people’s minds.