      *  @playerversion AIR 2.5
      *  @productversion Flex 4.5
      */
-    // TODO (chiedozi): PARB? exitOnBack?
-    public function get canCancelBackKeyBehavior():Boolean
-    {
-        return false;
+    public function get exitApplicationOnBackKey():Boolean
+    {
+        return true;
     }
     
     //----------------------------------

     *  @playerversion AIR 2.5
     *  @productversion Flex 4.5
     */
    public function canRemoveCurrentView():Boolean
    {
    	// This is a method instead of a property because the default
    	// implementation in ViewNavigator has a side effect

     *  @playerversion AIR 2.5
     *  @productversion Flex 4.5
     */
    mx_internal function backKeyHandler():void
    {
    }
    
    /**
     *  @private
     *  This method checks if the current view can be removed
     *  from the display list. This is mx_internal because the
     *  TabbedViewNavigator needs to call it on its children.
     * 
     *  @return Returns true if the screen can be removed
     *  
