them prepare for it. reporter: sheriff mike smith started the program after deputies found ns guns covering gunshot first aid, deescalation, self-defense and basic tactics. are you at all worried about a kid possibly getting your gun at school no. it would be on my person at all times secure and concealed. reporter: the country is going to ask why? those parents are expecting their kids to be kept safe. right now it s on the teachers it s my job. they look to me as the person to keep them safe. reporter: gadi schwartz, utah. an nbc news exclusive, our nearly year-long investigation uncovering an estimated 10,000 children working for pennies a day mining for a mineral used in cars, planes and electronics around the world. nbc s cynthia mcfadden traveled to madagascar for the