Adm. Mike Mullen addresses audience members at a preview of the PBS special "When Families Grieve." Chairman of the Joint Chiefs of Staff Adm. Mike Mullen addresses audience members at a preview of the PBS special "When Families Grieve" in the Pentagon on April 13, 2010. The program portrays the tales of children coping with the loss of a parent and skills that have helped them move forward. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 680916-F-ATC76-765.jpg Photo Gallery