The National Center for Missing and Exploited Children has released a poster of 16-year-old Riley Monk, who was last seen more than a week ago. His mother hopes her message will reach him. Unfortunately, the Monk family is not alone, as authorities report more than 40 children are currently missing in Nevada. John Bischoff from the center said, "Across the nation, we have nearly 4,000 missing child cases active on our website today." He explained that each case is different, with the most common