As South Korean lawmakers tried to impeach President Yoon Suk Yeol for declaring martial law, ruling party MPs stormed out of the chamber to thwart the effort -- except for 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.
