Very interesting article to say the least. Whenever I read articles about something blocking any kind of communication signals, I am reminded of a time once when my partner here at T.B.L traveled from Ohio to Virginia. During his trip, his GPS took him on Route 666 late after dark and while on that route he lost all cell phone service (and GPS) but the really crazy part is that the radio went crazy and began flipping through different frequencies with a few garbled words here and there as if it the scan button was pushed but the yet station remained the same.