This is one of those awesome stories about how some good engineering can save countless lives: Just think about how many lives have been saved globally, both in wartime and peacetime, because of portable metal detectors.
That's not to mention it's a great example of how technology developed for one purpose (detecting mines) spills over to other applications (archeology etc.)
I never knew it was an escaped polish engineer that invented these either- that even makes this a cool story about how important it is that we work together and help each other in times of need!