Twitter on Tuesday announced that every public tweet made since the dawn of Twitter that would be AD 2006 is now being indexed. That includes hundreds of billions of tweets, including major historical events. Twitter doesnt control content indexed by search engines like Google or Bing, so its quite possible that your old tweets will live on somewhere out there. Some news outlets are pointing to third party services which promise to delete specific slices of your Twitter history from all tweets more than a week old to anything more than 1 year old.”]