Billy's fists clench. "Maybe our worlds aren't so different. A few years ago a woman killed off sixteen million mutants, through the use of weapons called Sentinels. My -- a very powerful mutant wiped out all but two hundred of the rest." He kicks the dirt. "And a few years ago the government began requiring super humans to register their names and powers, and submit to a draft. It -- might be the end of heroes. It's what we're fighting against."