PAJU, South Korea — South Korean managers are heading back to their factories at a complex located just north of the Demilitarized Zone to team up with North Korean workers and test-run idle assembly lines.
It's the most recent sign of improving ties between rivals who were trading threats of war this spring.
Businessmen heading to the Kaesong complex Monday are relieved but also worried about whether they can make up for the millions of dollars lost since Pyongyang withdrew its 53,000 workers in April.
The park was established in 2004 and considered a test case for reunification because it combined South Korean knowhow and technology with cheap North Korean labor.
Pyongyang said its anger was because of annual military drills between Seoul and Washington and alleged insults against its leadership.