This photo composite shows an aerial view of FedEx Field in Landover, Md., home of the Washington Redskins, superimposed on Mars' Victoria Crater to give a sense of the crater's scale.

This photo composite shows an aerial view of FedEx Field in Landover, Md., home of the Washington Redskins, superimposed on Mars' Victoria Crater to give a sense of the crater's scale.

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