http://www.dtic.mil/whs/directives/corres/pdf/140410p.pdf My guess is that the government has accept the inevitability of a Nuclear or Biological attack on one or more American Cites and is doing what they can to prepare for the aftermath.
Shit they could have saved ink and just wrote, "we can do anything we want with you". I love the part about "ill or injured are elligible for evacuation" ...isn't that generous they included that and they're not going to charge me. And I love the way they use the word "volunteer" so flexibily. "you're volunteering to go in there where the ebola is". Anybody with that much control over whether I live or die I want at least $100,000. a year to start and a $1,000,000. life insurance policy. tax everybody at home on their couches for it too. When Chuck Norris and the mutants rebell we'll be ready.