Breaking Down Walls

"They told me I could help win the war, destroy the sentinels, save millions of lives. They didn't tell me I'd have to work with the freaking mutants to do it." A mutant-hating human is recruited to smuggle human-hating Magneto through the dangerous world of DoFP. Both find out that the end of the world has a way of breaking down walls. Erik/Charles but not central.