Comic-Con begins with action-packed preview night

Fans arrive at the San Diego Convention Center before preview night at Comic - Con on Wednesday July 11, 2012, in San Diego. (Photo by Denis Poroy/Invision/AP)The lines outside the San Diego Convention Center were almost as long as the ones inside as Comic-Con guests queued up to collect freebies and collectibles during the four-day festival's preview night.

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