'Guardians' tops Labor Day, summer box office

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LOS ANGELES (AP) — The intergalactic misfits of "Guardians of the Galaxy" are the summer's box-office superheroes.

According to studio estimates Monday, the Marvel space adventure topped the Labor Day box office with a three-day take of $22 million — its third time in first place since its release five weeks ago. With North American ticket sales of more than $280 million so far, "Guardians" is also the summer's — and the year's — top-grossing film to date.

Paramount's "Teenage Mutant Ninja Turtles" grabbed second place with $15.7 million, followed by Warner Bros.' young-adult drama, "If I Stay" with $11.6 million.

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