            'crossStreet': 'at 19th St',
                        'postalCode': '20036',
                        'state': 'D.C.'
                    }
                }
            ]
        };

        /**
         * Assign a unique id to each store. You'll use this `id`
         * later to associate each point on the map with a listing
         * in the sidebar.
         */
        stores.features.forEach((store, i) => {
            store.properties.id = i;
        });


        /**
         * Wait until t