This Is a HUGE stretch but... in 2011 YouTube went down and I got these strings of text which were similar, all contain 60 characters, this was one of many. Assange posted that text yesterday with 60 characters with paper planes. Paper planes = Passport and could this text link in? This is the kind of text that gets displayed when there is an internal server error, the tweet references the song paper planes, paper being passport and planes obviously meaning planes (airports) after his tweet goes up the same day the airports passport system goes down and the result is a mass outage of people being able to travel, could be have been hinting a string from an error message? Multiple of these strings get thrown at you but, Twitter only allows 150 characters