Obama sets off on European trip

US President Barack Obama has set off from Washington DC for Europe on his first major foreign trip since taking office in January.Mr Obama's first stop is London where he is due to attend the G20 summit.He will also join leaders at a Nato summit on the French-German border and visit the Czech Republic and Turkey.Mr Obama's mission during his tour will be to restore the US's place at the head of the diplomatic table, says BBC North America editor Justin Webb.He will do so by asserting that the US has changed - that America is willing to listen and engage, but he will also insist that America still has the capacity to pull the world in the right direction, our correspondent says.A White House spokesman stressed the president would "listen in London as well as lead".