Former Societe Generale trader Jerome Kerviel smokes a cigarette during a break on the last day of his appeal trial at Paris court June 28, 2012. Kerviel should serve five years in prison for his role in France's biggest-ever rogue trading scandal, a state prosecutor told a Paris court on Wednesday. Kerviel is appealing a three-year jail sentence handed down in 2010, as well as an order to repay SocGen 4.9 billion euros ($6.1 billion) lost by the French bank when it closed the trader's massive risky bets in 2008. REUTERS/Gonzalo Fuentes (FRANCE - Tags: BUSINESS CRIME LAW)