Trials for suspects in the deadly July 5 riot in Urumqi are expected to start the middle of US President Barack Obama (R) sits alongside Police Sergeant James Crowley (2nd R) of Cambridge, Massachusetts, and Harvard Professor Henry Louis Gates Jr. (2nd L), alongside US Vice President Joe Biden (L) as they share beers on the South Lawn near the Oval Office at the White House in Washington, DC.[Xinhua/AFP]