PREVIEW REMARKS Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, addesses audience members at a preview of the PBS special, "When Families Grieve," at the Pentagon, April 13, 2010. The program features the stories of children coping with the loss of a parent and highlights skills that have helped them move forward. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 056448-E-HCB94-943.jpg Photo Gallery