Not an EMT, not a fireman, not in law enforcement; but I do carry this and love it!
Here's the video.
(Wouldn't be in a car crash without one!) 
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'Wisdom To One Is Foolishness To Another; But, Alas, A Fool Knows Not The Difference; And, The Road To Hell? ...... It Remains Well Trod By Those Who Should Know Better.'
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