Uncanny X-Men Vol.1 #141
The New Brotherhood of Evil Mutants set out to assassinate a prominent senator, and if the X-Men can't stop them the fate of mutantkind will be sealed. Get your first glimpse of the dystopian post-apocalyptic future that will come to pass if Xavier's dream dies.
Printed: Jan 1981
Writers: Chris Claremont and John Byrne
Art: John Byrne and Terry Austin
Cover: John Byrne and Terry Austin