After four years, 800 hours and a missing-piece crisis, a grandpa has completed the world's largest commercial jigsaw puzzle — with a helping hand from his granddaughter. Lou Salas, from Colorado ...

Add Yahoo as a preferred source to see more of our stories on Google. In retirement, Lou Salas decided to take on a 29-foot puzzle, a map of the globe and its wonders. After over four years, he got to ...