On A snowy Sunday morning in December, David and Marie Works and their four daughters were about to elave church - a typical scene for thousands of families- when suddenly a gunman appeared, shooting at anyone who got in his way. Rachel and Stephanie Works were killed, and David was critically wounded The shootings at New Life Church are on of America's greatest recent tragedies. At the heart of that tragedy is the Works family. A mom and dad left to cope without two of their daughters, two sisters left to grieve the loss of their siblings. How do you make sense of a gunman who goes to church-determined to kill thousands of people? Is forgiveness possible? Is "moving on"? For the first time, David and Marie Works reveal the complete story of that fateful day.