Marty McFly’s legendary guitar: The great “Back to the Future” prop hunt, 40 years later

The hunt for Marty McFly's iconic guitar is on. Gibson and the Back to the Future cast are searching for the missing instrument. The guitar disappeared after filming the first movie. A new documentary, Lost to the Future, chronicles the search. Stars like Michael J. Fox and Christopher Lloyd are involved. They are urging fans to help find the guitar.