In this image released by the UN, Secretary-General Ban Ki-moon (R) walks with Lakhdar Brahimi (L), Joint Special Representative of the UN and the League of Arab States for Syria, in St. Petersburg, host city of the 2013 G20 Summit. In meetings with world leaders on the margins of the Summit, the Secretary-General and the Joint Special Representative have been urging for renewed efforts to rapidly convene the Geneva conference for Syria as soon as possible. == RESTRICTED TO EDITORIAL USE / MANDATORY CREDIT: AFP PHOTO / UNITED NATIONS / ESKINDER DEBEBE / NO SALES / NO MARKETING / NO ADVERTISING CAMPAIGNS / DISTRIBUTED AS A SERVICE TO CLIENTS ==