The men come from any number of backgrounds and range from young to old. In the end, Pensacola police said, they were united by a common goal: having sex with minors. During a five-day stretch that ended Sunday, all 22 of the men — including a pastor from a Florida church — were dragged down by “Operation Undertow,” an Internet sting in which undercover agents lured suspected child predators via computer to an undisclosed Florida location, police said. The men were snagged after they responded to ads for sex with teenage males and females created by agents on “various websites,”...