Leaflet Marker Cluster not appearing

I would like for my points to cluster using L.markerClusterGroup.

I am receiving a 200 status; but nothing appears on my map. I have commented out my markers which appear when uncommented.

http://ift.tt/1zJg08f

 /// var points = L.geoJson(geojsonfeatures, {
     ///filter: function(feature, layer) {
         /// return feature.properties.COUNTRY != "UNITED STATES";
    ///  },
     /// pointToLayer: function(feature, latLng) {
            ///  return L.marker(latLng)
                ///  .bindPopup(feature.properties.NAME);






   var points = L.markerClusterGroup();

    for (var i = 0; i < geojsonfeatures.length; i++) {
        var a = geojsonfeatures[i];
        var NAME = a[2];
        var marker = L.marker(new L.LatLng(a[0], a[1]), { NAME: NAME });
        marker.bindPopup(NAME);
        markers.addLayer(NAME);
    }










map = L.map('myMap', {
    center: centerlatlng,
    zoom: 6,
    layers: [aLayerOne]
});