Ambassador to South Korea, tweeted a picture Thursday of what he said showed North Koreans planting two trees and digging a trench at the spot where "Oh" crossed into the demilitarized zone that separates the two Koreas. Doctor says 24-year-old known as Oh needed two bodies’ worth of blood transfusions to save him and has nightmares about being sent back over border 
 
 North Korea’s latest defector, a young soldier being identified only by his family name Oh, is a quiet, pleasant man who has nightmares about being returned to the North, his surgeon has said. North Korean border guards who were chasing him had strayed into the area before turning back, technically violating the terms of the Korean War truce. The South Korean and U.S. soldiers who led a rescue attempt to drag the gravely injured soldier to safety have been awarded medals, according to U.S. "He told me that he is so thankful for South Koreans for saving his life and giving him so much blood," Lee said of the soldier in the interview. Pyongyang has not commented on the defection of its soldier, who is now in stable condition despite sustaining multiple injuries sustained from gunshot wounds to his arm and torso. Read more: 
 
 What the parasites in a defector’s stomach tell us about North Korea 
 
 Graphic: This thin ribbon of land separates North and South Korea 
 
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– North Korea is trying to make sure that no others will be able to defect the way that a young soldier did last week. The fixes aren't exactly high-tech: North Korean soldiers were seen digging a big trench in the border area where the soldier first drove and then ran to freedom, reports Reuters. They also planted trees, apparently to prevent vehicles from getting through in the future. Finally, North Korea also seems to have replaced all of its border security guards, reports the Yonhap news agency, which surmises that any officers involved are in for serious punishment. Details and developments: The soldier: "He's a pretty nice guy," the lead South Korean surgeon says of the 24-year-old defector, identified only by the name "Oh." The patient likes Bruce Almighty and CSI, though USA Today notes it's unclear whether he saw that US movie and show in the hospital or previously in North Korea on the black market. Oh faces a long recuperation, having been shot at least five times. One bullet decimated his colon. The surgeon: The incident has put the spotlight, again, on 48-year-old trauma surgeon Lee Cook-jong. Lee is the one giving regular updates after the surgeries he performs, and the Washington Post reports that he previously became a "national hero" in 2011 when he saved the life of a ship captain shot by Somali pirates. That feat became the subject of a medical drama. Lee, blind in one eye, also served as the inspiration for a character in a second drama called Romantic Doctor, Teacher Kim, which was released last year and gave him certifiable celeb status. The Post uses the terms "heartthrob" and "McDreamy" in the profile. Next for Oh: The surgeon, taking note of Oh's "jarhead" haircut, jokingly suggested that Oh eventually join the South Korean military: "He smiled and said that he would never ever go back to the military system again." When he's stronger, Oh will be debriefed. Then he'll get help with housing, education, and job training from the South Korean government, reports the Guardian.