Evidence of Innocence, India's Gold, Michael Phelps
July 22, 2012 8:00 PM
Michael Morton was exonerated by a DNA test after spending nearly 25 years in prison. Did a prosecutor hide evidence that could have proven his innocence? Then, Byron Pitts reports on India's obsession with gold; Also, Michael Phelps is back to a strict training regimen after uncertainty about returning to the Olympic games.