he's a full fledged member of maricopa county's official posse, under the leadership of sheriff joe arpaio we'll be training, trying to neutralize domestic terrorists without firearms and with firearms. >> reporter: the county's posse will protect the county's schools. it's the highest profile gambit from the man they call sheriff joe. >> if we have to take action, we will take action. if there's some type of catastrophe that's going to happen. >> reporter: and the stakes are higher than ever. >> a caller is indicating she thinks there's someone shooting in the building. >> reporter: five minutes is all it took for the horror to unfold in newtown, connecticut. so now the great debate is joined. how can we protect our children? this week, the national rifle association offered at least one answer -- arm teachers. >> that is an appropriate resource that a school should be able to utilize. >> reporter: but back in arizona, sheriff joe has decided to take matters into his own hands. >> we are here to protect the children. that's the main mission. >> they came across the border, they are crimin