Rare photos show life inside North Korea's top-secret military

A North Korean woman and soldiers look at a Chinese tour boat from the banks of the Yalu River near the North Korean town of Sinuiju, opposite the Chinese border city of Dandong.

REUTERS/Jason Lee

• North Korea's military, the fourth-largest in the world, remains shrouded in mystery.
• Both men and women are required to serve in the military in North Korea.
• Kim Jong Un, the supreme leader of North Korea, has no formal military experience.

Little is known about life inside the "hermit kingdom" of North Korea.