Photo courtesy of Twentieth Century Fox In yet another blow to Western civilization, Meet the Spartans ($18.7M) edged Rambo ($18.1M) to win the weekend box office crown. 27 Dresses proved surprisingly robust in its second frame, adding $13.6M ($45.3M) to its coffers. Last week's winner, Cloverfield, went in the opposite direction, plummeting over 68% and bringing in only $12.7M ($64.2M). The weekend's third wide opener, Untraceable finished fifth with $11.2M, in-line with expectations and......