In ungreased 13x9-inch (3-quart) glass baking dish, layer cantaloupe and quartered strawberries. Reserve 50 blueberries for flag stars. Layer remaining blueberries over strawberries. Top with bananas, pineapple and marshmallows. With pancake turner, press fruit lightly to even out top. Spread yogurt mixture evenly over fruit. If desired, at this point, salad can be covered and refrigerated up to 4 hours.