North Korean leader Kim Jong Un and South Korean President Moon Jae-in.
North Korean leader Kim Jong Un received a USB drive from South Korea's president during their summit last month at the demilitarized zone, multiple news outlets reported.
The USB drive contained a presentation and an e-book with a blueprint for economic cooperation that could link North Korea to Russia, China, and Europe through trade and trains.
The USB drive appears to provide further incentive for Kim to keep the agreements made at the inter-Korean summit.
USB drives are regularly smuggled over the border into North Korea with South Korean and Western entertainment and news.