For generations, the prototypical search-and-rescue case in America was Timmy in the well, with Lassie barking insistently to summon help. Lost children and adolescents — from the woods to the mall — generally outnumbered all others.
There have been numerous proposals to solve the problem of wandering dementia patients who go missing every day. But many families and caregivers are turning to GPS — a U.S. space-based global navigation satellite system — as a hi-tech solution.