by Cathy Lynn Grossman, USA Today

Atheists, humanists, skeptics and free thinkers are descending on the hallowed civic ground of the National Mall this Saturday for a Reason Rally.

Called together by word-of-Web and social media, they plan to head for Washington just like religious groups do — to strut their strength as a voting block, lobby for public policy and raise their social profile.

Organizers expect more than 10,000 people to celebrate unbelief, dance to punk band Bad Religion, hear a score of speakers led by celebrity British atheist Richard Dawkins, and shout out for separation of church and state.

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