function loadData(filePath){
        Cesium.loadJson(filePath).then(function(czml) {
                console.log("******************************");
                Cesium.processCzml(czml, dynamicObjectCollection, filePath);
                visualizers = Cesium.VisualizerCollection.createCzmlStandardCollection(scene, dynamicObjectCollection);
                var availability = dynamicObjectCollection.computeAvailability();
                if (availability.start.equals(Cesium.Iso8601.MINIMUM_VALUE)) {
                     clock.startTime = new JulianDate();
                     clock.stopTime = clock.startTime.addDays(1);
                     clock.clockRange = Cesium.ClockRange.UNBOUNDED;
                } else {
                     clock.startTime = availability.start;
                     clock.stopTime = availability.stop;
                     clock.clockRange = Cesium.ClockRange.LOOP;
                }
                clock.currentTime = clock.startTime;
                timeline.zoomTo(clock.startTime, clock.stopTime);
                var extent = new Cesium.Extent(-2.056, 0.587, -2.010, 0.633);
                scene.getCamera().controller.viewExtent(extent);

                console.log("******************************");
            }, function (e) {
                console.error(e);
        });
    }