It is Free Comic Book Day 5/5/2012: Serenity, Avengers, Buffy & The Guild.
- Not just United States!
And lots of other free comics.
There is a link on the page to find a participating Comic Book store. You can
Search US/Canada Locations or Locate shops outside of North America.
Also links to preview the comics.
Funny, how they left the / out on the names of these comics so they read:
Star Wars Serenity
Buffy the Guild