G20 media pack scents blood and Obama

The press gather outside 10 Downing Street ahead of the arrival of US President Barack Obama Photograph: Fiona Hanson/PA

Foreign secretary, David Miliband, secretary of state, Hillary Clinton, arrive at 10 Downing Street with the assembled press behind them Photograph: Dylan Martinez/Reuters

Gordon Brown and Barack Obama leave 10 Downing Street in front of the world's media Photograph: Dylan Martinez/Reuters

Prime minister Gordon Brown and President Barack Obama walk away from 10 Downing Street to give a news conference at the Foreign Office in London Photograph: Matt Dunham/AP

Demonstrators smash into the RBS Bank in Threadneedle Street during G20 demonstrations in London Photograph: Gareth Fuller/PA

A demonstrator climbs out from the broken windows of a Royal Bank of Scotland branch, near the Bank of England, captured by dozens of cameras Photograph: Kieran Doherty/Reuters

A young photographer take pictures on a man's shoulders of the protesters at the Climate Camp outside the Climate Exchange, Bishopsgate, London Photograph: Ben Birchall/PA

A press photographer takes a picture of a police officer inside a cordoned area close to the Bank of England Photograph: Adrian Dennis/Getty Images

A G20 protester is centre of media attention outside the Bank of England Photograph: Ray Tang/Rex Features

French President Nicolas Sarkozy arrives for a dinner hosted by Gordon Brown at 10 Downing Street Photograph: Steve Parsons/PA

Journalists at work at the Excel conference centre in east London Photograph: Martin Argles/Guardian

Peter Mandelson speaking at the G20 summit media area Photograph: Martin Argles/Guardian