world news  Barack Obama's diplomatic smileathon  A new
22-second film reveals the US president's extraordinary capacity
for grinning and bearing numerous photocalls with the same
diplomatic smile  Being photographed next to Barack Obama has
become the must-do activity for any world leader. Silvio
Berlusconi's cheesy thumbs up at the G20 in London revealed how
desperate global statesman can get to be snapped with the US
president. But now the attraction of the Obama photocall may
have lost some of its lustre.  Blogger Eric Spiegelman quips
that his new film is proof that the president is a robot, a
waxwork or a cardboard cut-out.  The White House released 130
photographs of the president with various foreign dignitaries at
a dinner during the United Nations general assembly last week.
Spiegelman snipped them together and put them to music, to
create a video gem that has quickly gone viral.  The Guardian
also featured several of the best in a special gallery.  "No
human being has a photo smile this amazingly c