Issue: #20
First - learn the truth about the Hellfire Club's involvement in the X-Men's quest. Then, the mutant race faces elimination at the hands of a vaccine erasing the X-Gene from future generations...
Creators: Alan Fine, Dan Buckley, Joe Quesada, Jordan D. White, Guru-eFX, Joe Caramagna, C. B. Cebulski, Jeff Powell, Whilce Portacio, Chris Robinson, Erick Arciniega, Salvador Larroca, Matthew Rosenberg
Characters: Mr. Sinister, Cyclops, Emma Frost, Havok, Hope Summers, Juggernaut, Wolverine, Mystique, Banshee, Ruckus, Marrow, Ramrod, Dark Beast, Madrox, Trevor Fitzroy, Psylocke, Magik, Gorgeous George, Hairbag, Elixir
Story arcs: We Have Always Been