Unity proves elusive at G20 photo opportunity

U.S. President Barack Obama (L) laughs with Italy's Prime Minister Silvio Berlusconi (C) and Russia's President Dmitry Medvedev as they pose for a family photograph at the G20 summit at the ExCel centre, in east London April 2, 2009.

LONDON (Reuters) - Getting world leaders together for a G20 summit photograph proved impossible Thursday -- despite two attempts.

Canadian Prime Minister Stephen Harper missed out on take one, British officials said.

A second take was hastily scheduled. This time Italian Prime Minister Silvio Berlusconi was conspicuous by his absence.

With many leaders on tight schedules, there were no plans to try to make it third time lucky, officials said.