Opposition leader Mahathir Mohamad, who stunningly trounced Malaysia's once-mighty National Front coalition in Wednesday's general election, was sworn-in Thursday as the country's seventh prime minister.Dressed in a formal black and gold Malay traditional attire, the 92-year-old former strongman who ruled between 1981 and 2003, took his oath before King Muhammad V at the National Palace, officially making him the world's oldest head of government.Wednesday's election victory of an alliance of four opposition parties ended 61 years of rule by the National Front, also known as Barisan Nasiona…READ FULL ARTICLE