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Another article in that book was something about a military aircraft
hanger that was made of wood.(in Germany, I think it was) The radar
system at that base in Gemany was making the nails in that hanger
glow red hot and with popping noises too, they wound up having to
do some readjustments with that radar system.

This is an absurd urban legend.

Microwaves have to be absorbed to heat something. Metallic objects reflect
microwaves and are therefore not heated.

A microwave field with sufficient power to heat nails red-hot (assuming the
nails absorbed the energy, which they don't) would quickly kill any living
thing in that field.