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Aliens are creeping back into theaters this week with the release of J.J. Abrams' hotly anticipated 'Super 8,' about a group of kids who captures a mysterious train crash on their video cameras in 1979. Will this be summer's next big hit? Or are audiences cool on alien-invasion movies? Check out the trailer after the jump, then get a list of movies still playing in theaters, to help plan your week

As many predicted, 'X-Men: First Class' easily took the top spot at the box office this weekend. Still, the Marvel reboot, which traced the beginnings of the 'X-Men' characters, managed to fall well below expectations, taking in just $56.0 million. To put things in perspective: That's the lowest debut by an 'X-Men' movie since the franchise launched in 2000, with $54.5 million.