US President Barack Obama (R) sits down for a beer with Harvard scholar Henry Louis Gates (2nd L), Cambridge, Massachusetts, police Sergeant James Crowley (2nd R) and Vice President Joe Biden to try to start a dialogue on better race relations in the Rose Garden at the White House in Washington, July 30, 2009. Crowley arrested Gates for disorderly conduct in his own home July 16 while investigating a report of a burglary in process. Obama inflamed tensions by saying police had "acted stupidly," prompting him to back down from the remark. [Xinhua/AFP]