Part of Merritt Square Mall in Merritt Island, Fla., will take on an unearthly tone during two “Mars at the Mall” days presented by NASA on May 9 and 10 to celebrate Florida’s role as America’s gateway to Mars. The event, complete with a 3-D martian mural, models of NASA Mars rovers and a gallery of Mars pictures, will share excitement about two new rover missions to Mars scheduled to launch from Cape Canaveral in June. Preparations for launch are under way at NASA’s Kennedy Space Center.