It says "electronic," not "electric." Which is not to imply that that's a whole lot more sensical.

I suspect it is a pad of sensors to sense when people walk over it. I also suspect he is not wedded to it, just to looking into options and doing something effective expeditiously, because when he was asked about it on RT he said 'yeah, that, or we could.....'

They should just set up one of those sonic booms fences like the island had. That'll keep those smoke monstery Mexicans outta my women!