New X-Men By Grant Morrison Vol. 5: Assault on Weapon Plus
Collects New X-Men #139-145.
More secrets of the world's deadliest mutant are exposed! Wolverine, Cyclops and the enigmatic mutant known as Fantomex travel to the other side of the world and beyond in search of the keys to their pasts. However, what they find within the deadly Weapon X program may be more frightening than their worst nightmares!