Fullmetal Alchemist Vol. 8 (manga)

The raid on the Devil's Nest becomes a slaughter, as government troops--led by the Führer President himself, King Bradley--exterminate the half-human forces of the Homunculus Greed. But will Ed and Al survive the battle unchanged? As Greed is sent to meet his maker, foreign travelers arrive in Amestris, having crossed the great desert from the eastern country of Xing. Their names are Mei and Ling, and they've come for the Philosopher's Stone...and a secret even the Elric brothers never imagined...