First Lady Michelle Obama unveiled the White House Christmas decorations on Wednesday (November 28th), which this year have the theme of "Joy to All," in a special ceremony for military families and their children. The biggest of the Executive Mansion's 54 Christmas trees is a 18-foot-6-inch Fraser fir in the Blue Room, which features handmade decorations by children whose parents are stationed on military bases around the world. There also a tree that features special Gold Star ornaments bearing the names of those who died in combat. Other trees feature tributes to past first ladies and their Christmas themes, going back to Jacqueline Kennedy's Nutcracker-themed decorations. In what has become somewhat of a tradition, there are also decorations throughout the White House in the likeliness of the Obamas' dog, Bo. And, as always, there is the nearly 300-pound gingerbread house that's an exact replica of the White House. Click here to see pics!