The President seems to have learned little from the fuss made over his bow to Emperor Akihito of Japan in November, or indeed the outcry when he did the same to King Abdullah of Saudi Arabia last April. This week, Obama was at it again, appearing to bow his head towards Chinese President Hu Jintao. Conservative bloggers were united in their outrage. Evidently, "the United States now willingly prostrates itself before the rest of the world," says Scott Johnson at PowerLine. But at a time when the US is trying to stop China manipulating its currency, says an editorial in the New York Times, politeness is at a premium. Watch Obama's greeting of Hu Jintao and decide for yourself: