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An impressive crowd of self-proclaimed Star Trek nerds beamed up to this year's Star Trek Convention, held over the weekend at San Francisco's Westin St. Francis Hotel. Click through for the most amazing costumes, Picard vs. Kirk smackdown and more. Pics byJoseph Schell. View more in "Trek Chicks Rock."and read more in Anna McCarthy's "Best of S.F.'s Trekkie Invasion."