var viewer = new Cesium.Viewer('cesiumContainer', {
        animation : false,
        baseLayerPicker : false,
        fullscreenButton : false,
        geocoder : false,
        homeButton : false,
        sceneModePicker : false,
        timeline : false,
        infoBox : false,

        //Use standard Cesium terrain
        terrainProvider : new Cesium.CesiumTerrainProvider({
            url : 'http://cesiumjs.org/smallterrain',
            credit : 'Terrain data courtesy Analytical Graphics, Inc.'
        }),

    });

    //Allow users to zoom and follow objects loaded from CZML by clicking on it.
    viewer.extend(Cesium.viewerDynamicObjectMixin);

    var czmlSource = new Cesium.CzmlDataSource();
    czmlSource.loadUrl('simple_czml.czml');

    viewer.dataSources.add(czmlSource);