Well metal detectors can help to save a life in the event that someone has a weapon or is armed, the dectector can sense the metal in a gurn, for example, which can sve lives because if that person meant harm on others, the gun can be detected before somethinf terrible happens. Hope this helps!
Because the man needed help
I strongly believe that time spent learning a trade for career development is as valuable as the time invested in a college degree.
I think that the most important thing is the time invested in your dreams, it doesn't matter if it is a college degree or a trade, nor if one takes longer than the other or if one of them will get you more money. Time spent in something you don't like to do, eventually, will be a waste because you will not be happy doing that job and will probably quit sooner or later.
Whether you pick one thing or the other, you must really love it, you have to be passionate about it and, if you do this, it'll be never a waste of time.
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