"Police Dog Barks Non-Stop At Crying Girl—When They Opened Her Pink Backpack, The Whole Airport Went Silent. I’ve been a K-9 handler for twelve years. I’ve seen Rex sniff out narcotics wrapped in coffee grounds and explosives hidden in car tires. But I have never—never—seen him react like this to a child. It was two days before Thanksgiving. The terminal was a zoo. And there was this little girl, maybe six years old, clutching a dirty pink backpack like it was gold. Rex didn’t just alert. He scr