This article is sort of a classic view of progressive logic.

What, pray tell, "triggered" (!) the [defensive] measures of metal detectors?

I think it would help for everyone to be no closer than 100 meters from an IED being "triggered" just one time.

I'm not asking anyone to strap on 70% of their weight and crawl through houses for 4 weeks in a row waiting at every moment to be shot or blown up. 

I'm not asking anyone to have to really be in an IED blast, or to have to pick your friend's body parts after an IED blast.   No. 

I'm just asking for progressives to experience the tiniest bit of danger even quite remotely before forming another progressive (armchair) thought.