One of France's biggest ever corruption trials ended late Monday after four months of hearings, with top executives of the formerly state-owned oil company Elf Aquitaine facing prison terms of up to eight years. The executives are accused of presiding over a system of bribery and commissions that exploded out of control after Le Floch-Prigent took over the company in 1989 - with payments of millions to secure contracts in Africa and elsewhere.