After handshakes and concert, G20 seeks 'difficult' consensus

By Paul Carrel and Thomas EscrittHAMBURG (Reuters) - Leaders from the world's top economies meet to forge a consensus on trade and climate change on Saturday after setting their staff to work through the night to find agreements that eluded them on the first day of their summit.Germany's Angela Merkel treated the leaders to a concert at Hamburg's Elbphilharmonie on Friday night, where they listened to Beethoven while their aides began an all night slog aimed bridging differences with the adminis