As South Korean lawmakers tried to impeach President Yoon Suk Yeol for declaring martial law, ruling party MPs walked out of parliament to thwart the effort -- all except Ahn Cheol-soo. Ahn -- a self-made multi-millionaire, trained doctor and software designer -- sat alone in his party's bank of chairs in the National Assembly debating hall, one of just two members of the ruling People Power Party to vote to remove Yoon from office. "I didn't vote for the opposition party. I voted for the people," he tells AFP at an interview in his office. IMAGES AND SOUNDBITES