Did President Obama Bow to China's President Hu Jintao at Nuclear Security Summit?

Did President Obama bow to China's President Hu Jintao at Nuclear Summit?

REUTERS/Jim Young

What is it with President Obama and bowing to foreign leaders? It seems that he greeted China's President Hu Jintao with a bow Monday at the Nuclear Security Summit in Washington. I know we are allowing China to screw us royally, but why appear servile?