Davos 2012: World Economic Forum highlights - in pictures

Britain's prime minister David Cameron covers his face as he looks at the audience during a session at the World Economic Forum in Davos Photograph: Arnd Wiegmann/Reuters Lord Coe, London mayor Boris Johnson and Cameron attend an event to publicise the six-month countdown to the Olympics Photograph: Fabrice Coffrini/AFP/Getty Images Cameron and Coe enjoy listening to Johnson's speech Photograph: Fabrice Coffrini/AFP/Getty Images German chancellor Angela Merkel works on her speech Photograph: Anja Niedringhaus/AP South African president Jacob Zuma and former British prime minister Gordon Brown on stage Photograph: Vincenzo Pinto/AFP/Getty Images Microsoft founder Bill Gates promotes the Global Fund's 10th anniversary. Gates announced a $750m contribution to the fund to fight Aids, tuberculosis and malaria Photograph: Fabrice Coffrini/AFP/Getty Images Palestinian prime minister Salam Fayyad and Shimon Peres, president of Israel Photograph: Vincenzo Pinto/AFP/Getty Images Editor-in-chief of the Huffington Post, Arianna Huffington Photograph: Nadine Rupp/Getty Images South African Nobel laureate Archbishop Desmond Tutu Photograph: Michel Euler/AP The chairman of Soros Fund Management, George Soros, speaks to journalists Photograph: Eric Piermont/AFP/Getty Images Helle Thorning-Schmidt, prime minister of Denmark prepares to make her address Photograph: Vincenzo Pinto/AFP/Getty Images Jimmy Wales, founder of Wikipedia, gestures during an interview. Wales is fighting to stop a US plan to tighten anti-piracy laws Photograph: Anja Niedringhaus/AP Protesters from the Occupy anti-capitalist movement prepare to release a banner during a demonstration outside Davos Photograph: Anja Niedringhaus/AP