In 1973, when Shin Jae-hyung was a teenager, he was out in the streets being teargassed, fighting against South Korea's then-military dictator Park Chung-hee. He never thought he would have to do it again in 2024. But when he heard the country's current president, Yoon Suk Yeol, had declared martial law this week -- the first time democratic South Korea had experienced it in 40 years -- he raced to the National Assembly thinking: "We must stop this." IMAGES AND SOUNDBITES