The Uncanny X-Men #270: First Strike (X-Tinction Agenda)

X-Tinction Agenda: Part 1 of 9. "First Strike!" Guest-starring Jean Grey, the New Mutants. Story by Chris Claremont. Art by Jim Lee, Art Thibert, and Scott Williams. Cover by Jim Lee and Scott Williams. The nation of Genosha declares war on the Children of the Atom. And not everyone will survive the "First Strike!" Story continues in New Mutants #95.