On the Twitter account , the usual image atop the page was replaced with one that reads `` tango down '' -- military slang that has been appropriated by hackers to say they have interrupted service to a website . Attack has hallmarks of hackers collective Anonymous . Comment: Official North Korean Flickr account shows image skewering Kim Jong Un .
Attack has hallmarks of hackers collective Anonymous . Comment: Official North Korean Flickr account shows image skewering Kim Jong Un .