Another press conference was held in 2013 featuring another couple - Kim Kwang-ho and Kim Ok-sil - who entered the South in 2009 and returned to the North in 2012.
Lieutenant General Jan-Marc Jouas, the former Deputy Commander of US forces in Korea, said the US would not even be able to build-up their forces before a war took place, in a chilling letter to the Democrats, seen by Newsweek.
The soldier was shot and injured by his own military as he crossed to the South Korean side of the Joint Security Area in the village of Panmunjom.
"He crossed from a North Korea post towards our [South Korean] Freedom House", the South said in a statement.
The defection through the JSA marks a very rare case, given that North Korean soldiers stationed on the frontline are reportedly cherry-picked for their loyalty to the North Korean regime.
How many North Koreans defect annually?
About 1,000 people from the North flee to the South each year - but very few defect via the DMZ. This reveals the importance of the resettlement process, putting the spotlight on the need to support the transition and settlement of defectors into South Korean society.
Lieu said he was shocked that the letter highlighted the fact that the US military couldn't just send over troops right now, because an attack from Jong-un would be provoked.
To support increased cooperation between South Korea and ASEAN countries, Seoul will double its support fund to $14 million per year by 2019, President Moon said.
North Korea has typically accused South Korea of enticing its citizens to defect, something the South denies. The man was captured about an hour later in an area controlled by the 28th Infantry Division.
The most famous incident was in 1976, when two American army officers were killed by ax-wielding North Korean soldiers.
In 1984, North Korean and U.N. Command soldiers traded gunfire after a Soviet citizen defected by sprinting to the South Korean sector of the truce village.