Deputy Secretary Lynn, Adm. Mike Mullen and the Sesame Street Muppets Elmo, Jesse and Rosita host a preview of the PBS special "When Families Grieve." Deputy Secretary of Defense William J. Lynn, Chairman of the Joint Chiefs of Staff Adm. Mike Mullen and the Sesame Street Muppets Elmo, Jesse and Rosita host 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 IMAGE: Download Image: Full Size (0.05 MB) Photo By: VIRIN: 132464-C-PHH29-837.jpg Photo Gallery