THE COMMUNITY ORGANIZER

Can anyone cite for me anything that Barack Obama actually achieved as a community organizer? He repeatedly cites his work as a CO as a badge of honor, but I've never heard him refer to any actual accomplishment, and a quick Google search doesn't help. Anybody?

ALSO: Here's me being maybe superficial, but Obama's hair was clearly grayer in the debate last night. Was he advised to let it gray to add gravitas to his affect?