Lawmaking with pepper: Tear gas vs. US deal (VIDEO)
Video footage from Yonhap showed Kim Sung-dong throwing a powder substance towards Chung Eui-hwa. The latter was seen wiping his eyes after the incident, while other lawmakers covered their mouths with handkerchiefs.
Security guards ushered Kim out of the chamber as he shouted in disgust.
The trade deal between South Korea and the United States was ratified with 151 votes in favor and seven against.