The Economy & The Fiscal Cliff
• U.S. stocks increase in first day of 2013 trading following "cliff" deal
• With "cliff" deal reached, House members turn attention to Sandy bill
• Despite deal reached, budget fights anticipated over next coming months
• LIVE COVERAGE: Latest political news from Reuters
CARTAGENA, Colombia/BEIRUT U.S. Secretary of State John Kerry defended his efforts to negotiate with Moscow over the war in Syria on Monday, despite the collapse of a ceasefire that has led to a massive Russian-backed assault on the besieged rebel-held sector of Aleppo.