South Korean TV showed elderly North Koreans straightening their stooped backs to get a final look at loved ones who had boarded the buses. As their breaths steamed in the cold air, men wearing suits and women wearing thin traditional Korean dresses waved without gloves.
Some stood on tiptoes so they could put both of their hands on the bus windows, their loved ones doing the same on the inside of the glass.
South Koreans on the bus shouted out goodbyes, wiping their faces with one hand and waving with the other. Some held up paper with names or thank you messages.
"Let's meet again later," South Korean Woo Young-shik wrote in part to his aunt. Then, flipping the paper over, he wrote a second message: "Stay healthy until the day we reunite."