Barry Gibbs spent 19 years in prison for a murder he didn’t commit. David Shepard was wrongfully convicted of rape, and served 10 years of a 30-year sentence. Both were exonerated. But exoneration comes with its own set of challenges. Mr. Gibbs, Mr. Shepard, and Innocence Project attorney Vanessa Potkin explain why returning to the outside world is so difficult…and whether anything can make up for the years lost in prison.