'Avatar' leads box office once again

Well, Mel Gibson has joined Denzel Washington and Dwayne Johnson on the list of stars that couldn't stand up to "Avatar's" box-office might. The film on track to cross Titanic's domestic gross of $600 million in mere days took the top spot again this weekend, falling just 14 percent, which is a smaller drop-off than last weekend. Earning an additional $30 million, "Avatar's" domestic total now stands at $594 million.

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