Uncanny X-Men Vol.1 #142
In order to prevent a dystopian future where all mutants and super-heroes are hunted and killed by the robotic Sentinels, the X-Men must prevent the new Brotherhood of Evil Mutants from assassinating Senator Kelly.
Printed: Feb 1981
Writers: Chris Claremont and John Byrne
Art: John Byrne and terry Austin
Cover: Terry Austin