diff --git a/Source/DataSources/CzmlDataSource.js b/Source/DataSources/CzmlDataSource.js
index 64b9c5d83cc4..5c445300d706 100644
--- a/Source/DataSources/CzmlDataSource.js
+++ b/Source/DataSources/CzmlDataSource.js
@@ -21,12 +21,14 @@ define([
         '../Core/HermitePolynomialApproximation',
         '../Core/isArray',
         '../Core/Iso8601',
+        '../Core/joinUrls',
         '../Core/JulianDate',
         '../Core/LagrangePolynomialApproximation',
         '../Core/LinearApproximation',
         '../Core/loadJson',
         '../Core/Math',
         '../Core/NearFarScalar',
+        '../Core/objectToQuery',
         '../Core/Quaternion',
         '../Core/Rectangle',
         '../Core/ReferenceFrame',
@@ -107,12 +109,14 @@ define([
         HermitePolynomialApproximation,
         isArray,
         Iso8601,
+        joinUrls,
         JulianDate,
         LagrangePolynomialApproximation,
         LinearApproximation,
         loadJson,
         CesiumMath,
         NearFarScalar,
+        objectToQuery,
         Quaternion,
         Rectangle,
         ReferenceFrame,
@@ -217,7 +221,16 @@ define([
     function unwrapUriInterval(czmlInterval, sourceUri) {
         var result = defaultValue(czmlInterval.uri, czmlInterval);
         if (defined(sourceUri)) {
-            result = getAbsoluteUri(result, getAbsoluteUri(sourceUri));
+            var uriComponents = sourceUri.split('?');
+            var sourceUriPath = uriComponents[0];
+            var query = uriComponents[1];
+            result = getAbsoluteUri(result, getAbsoluteUri(sourceUriPath));
+
+            if (defined(query)) {
+                // Add back the question mark and append to the result
+                query = '?' + query;
+                result = joinUrls(result, query, false);
+            }
         }
         return result;
     }
@@ -1892,9 +1905,18 @@ define([
 
         var promise = czml;
         var sourceUri = options.sourceUri;
+        var query = options.query;
+        var queryBlob = defined(query) ? '?' + objectToQuery(query) : '';
+
+        // If the czml is a URL
         if (typeof czml === 'string') {
-            promise = loadJson(czml);
             sourceUri = defaultValue(sourceUri, czml);
+            czml = joinUrls(czml, queryBlob, false);
+            promise = loadJson(czml);
+        }
+
+        if (defined(sourceUri)) {
+            sourceUri = joinUrls(sourceUri, queryBlob, false);
         }
 
         DataSource.setLoading(dataSource, true);
@@ -1973,6 +1995,7 @@ define([
      * @param {String|Object} czml A url or CZML object to be processed.
      * @param {Object} [options] An object with the following properties:
      * @param {String} [options.sourceUri] Overrides the url to use for resolving relative links.
+     * @param {Object} [options.query] Key-value pairs which are appended to all URIs in the CZML.
      * @returns {Promise.<CzmlDataSource>} A promise that resolves to the new instance once the data is processed.
      */
     CzmlDataSource.load = function(czml, options) {
diff --git a/Specs/DataSources/CzmlDataSourceSpec.js b/Specs/DataSources/CzmlDataSourceSpec.js
index 58f4d10f22ed..5bf2bc771748 100644
--- a/Specs/DataSources/CzmlDataSourceSpec.js
+++ b/Specs/DataSources/CzmlDataSourceSpec.js
@@ -15,6 +15,7 @@ defineSuite([
         'Core/Iso8601',
         'Core/JulianDate',
         'Core/loadJson',
+        'Core/loadWithXhr',
         'Core/Math',
         'Core/NearFarScalar',
         'Core/Quaternion',
@@ -51,6 +52,7 @@ defineSuite([
         Iso8601,
         JulianDate,
         loadJson,
+        loadWithXhr,
         CesiumMath,
         NearFarScalar,
         Quaternion,
@@ -258,13 +260,13 @@ defineSuite([
 
     it('process loads expected data', function() {
         var dataSource = new CzmlDataSource();
-        dataSource.process(simple, simpleUrl);
+        dataSource.process(simple);
         expect(dataSource.entities.values.length).toEqual(10);
     });
 
     it('process loads data on top of existing', function() {
         var dataSource = new CzmlDataSource();
-        dataSource.process(simple, simpleUrl);
+        dataSource.process(simple);
         expect(dataSource.entities.values.length === 10);
 
         dataSource.process(vehicle, vehicleUrl);
@@ -273,7 +275,7 @@ defineSuite([
 
     it('load replaces data', function() {
         var dataSource = new CzmlDataSource();
-        dataSource.process(simple, simpleUrl);
+        dataSource.process(simple);
         expect(dataSource.entities.values.length).toEqual(10);
 
         dataSource.load(vehicle, vehicleUrl);
@@ -554,6 +556,52 @@ defineSuite([
         expect(imageProperty.getValue(JulianDate.fromIso8601('2013-01-01T01:00:00Z'))).toEqual(source + 'image2.png');
     });
 
+    it('appends query to all uri', function() {
+        var source = 'http://some.url.invalid/';
+        var packet = {
+            billboard : {
+                image : [{
+                    interval : '2013-01-01T00:00:00Z/2013-01-01T01:00:00Z',
+                    uri : 'image.png'
+                }, {
+                    interval : '2013-01-01T01:00:00Z/2013-01-01T02:00:00Z',
+                    uri : 'image2.png'
+                }]
+            }
+        };
+
+        var dataSource = new CzmlDataSource();
+        dataSource.load(makePacket(packet), {
+            sourceUri : source,
+            query : {
+                token : 34570,
+                password : "Passw0rd"
+            }
+        });
+        var entity = dataSource.entities.values[0];
+        var imageProperty = entity.billboard.image;
+        expect(imageProperty.getValue(JulianDate.fromIso8601('2013-01-01T00:00:00Z'))).toEqual(source + 'image.png' + '?token=34570&password=Passw0rd');
+        expect(imageProperty.getValue(JulianDate.fromIso8601('2013-01-01T01:00:00Z'))).toEqual(source + 'image2.png' + '?token=34570&password=Passw0rd');
+    });
+
+    it('appends query tokens to source URL', function() {
+        var dataSource = new CzmlDataSource();
+        var requestNetworkLink = when.defer();
+
+        spyOn(loadWithXhr, 'load').and.callFake(function(url, responseType, method, data, headers, deferred, overrideMimeType) {
+            requestNetworkLink.resolve(url);
+            deferred.reject();
+        });
+
+        dataSource.process(simpleUrl, { query : {
+                                            "token" : 30203,
+                                            "pass" : "passw0rd"
+                                        }});
+        return requestNetworkLink.promise.then(function(url) {
+            expect(url).toEqual(simpleUrl + '?token=30203&pass=passw0rd');
+        });
+    });
+
     it('CZML adds data for constrained billboard.', function() {
         var billboardPacket = {
             billboard : {