Napoleons Mass Grave

In March 2002, in Vilnius, Lithuania, construction workers uncovered a mass grave filled with close to 2,000 skeletons. Scientists determined that the remains belonged to the last remnants of Napoleon's Grand Army retreating from Moscow in 1812. The find offers new insight into Napoleon's invasion of Russia, the largest military disaster ever recorded. Follow scientists as they seek to learn who these people were and how they died. Was it a massacre, an epidemic, or the result of brutal cold?