This, for me, battles hard against Castaway for the most emotional film I've seen Tom Hanks in. People would argue Forrest Gump but I don't particularly find that one sad. Sure, Jenny died but I don't know. It just didn't do it for me.
Captain John Miller (Tom Hanks) takes his men behind enemy lines to find Private James Ryan, whose three brothers have been killed in combat. Surrounded by the brutal realities of war, while searching for Ryan, each man embarks upon a personal journey and discovers their own strength to triumph over an uncertain future with honor, decency, and courage.