In Pictures: World leaders gather in Hamburg for G-20 summit

Leaders of the Group of 20 major economies touched down in Hamburg on Thursday (July 6) for their annual summit. German Chancellor Angela Merkel is hosting the two-day event which starts on Friday, and this year's theme is 'Resilience, Sustainability and Responsibility'. Global trade, climate warming and terrorism are among the main issues on the agenda, with North Korea's missile tests another item set to see hot debate. Singapore, Vietnam and Spain are among the countries invited to take part in the summit.