The Ticker: U.S.’s downgrade; Wikipedia’s contributors; Ai Weiwei Tweets; Gore calls B.S. on misinformation; LinkedIn’s earnings call

Sydney Morning HeraldAgency rating downgrade is little more than a political PR stunt

Associated PressWikipedia Says It’s Losing Contributors

The TelegraphAi Weiwei back in communication on Twitter

Colorado IndependentAl Gore calls B.S. on corporate polluters

ReadWriteWebLinkedIn Makes First Earnings Call A More Social Affair