It's another triumphant weekend for "Guardians of the Galaxy."br br The film, already the biggest moneymaker of the year, continued its assault on the box office even after a month in theaters, securing the number one spot with $10.2 million in U.S. and Canadian ticket sales.br br Coming in second this weekend at the box office is "Teenage Mutant Ninja Turtles," which brought in $6.5 million in ticket sales.br br That was followed by the teen-focused drama "If I Stay," which netted $5.8 million, according to studio estimates.