(Portland, OR) -- A Portland man has been sentenced to federal prison for trying to meet children for sex. Federal prosecutors say 64-year-old Marc McCool responded to an ad on social media posted by an undercover agent. He believed he was going to Seattle to meet seven- and eleven-year-old children for sex. He traveled by train and took an Uber to the meeting location where he was arrested. McCool was sentenced to four years in federal prison.