def describe_cluster_snapshots(self, cluster_identifier):
        """
        
        """
        response = self.get_conn().describe_cluster_snapshots(
            ClusterIdentifier=cluster_identifier
        )
        if 'Snapshots' not in response:
            return None
        snapshots = response['Snapshots']
        snapshots = filter(lambda x: x['Status'], snapshots)
        snapshots.sort(key=lambda x: x['SnapshotCreateTime'], reverse=True)
        return snapshots