A North Korean soldier man rides his bicycle near Sinuiju, opposite the Chinese city of Dandong, on April 15, 2017. #

A North Korean soldier stands guard along the bank of Yalu River near the North Korean town of Sinuiju, on May 1, 2014. #

A North Korean waves from a bridge destroyed during the Korean War across the Yalu River in North Korea on May 26, 2009. #

A North Korean woman carries water she collected from the Yalu River in the North Korean city of Hyesan, which borders China's Changbai county, on April 6, 2009. #

A North Korean fisherman fixes his net on the bank of the Yalu River near the North Korean town of Sinuiju, on October 24, 2006. #

A South Korean girl views North Korean territory at the unification observation in Paju, near the border with North Korea, on September 13, 2016. #

A North Korean soldier plays a guitar on the banks of the Yalu River near the North Korean town of Sinuiju, on April 15, 2009. #

A North Korean border guard points his weapon toward the photographer on the banks of the Yalu river near the North Korean city of Hyesan on December 1, 2008. #

A North Korean soldier kicks a goat on the banks of the Yalu River near the North Korean town of Sinuiju on July 5, 2009. #

A North Korean soldier smiles near the town of Sinuiju, as seen from the opposite Chinese border city of Dandong, on January 6, 2016. #

The sun rises from the North Korean side of the Yalu River near the town of Sinuiju, seen from Dandong, China, on April 1, 2017. #

A North Korean soldier stands guard on the banks of the Yalu River, near the town of Sinuiju, on November 23, 2010. #

A North Korean soldier walks with pigs at a watchtower on the Yalu River in Sinuiju, North Korea, on April 15, 2017. #

A North Korean soldier gestures to a Chinese vehicle on the banks of the Yalu River near the North Korean town of Sinuiju, on May 27, 2010. #

The sun rises through fog over the Friendship and the Broken bridges over the Yalu River connecting Sinuiju, North Korea, and Dandong, China, on March 30, 2017. #

A North Korean soldier climbs trees on the banks of the Yalu River across the river from Dandong in northeast China's Liaoning province on November 25, 2010. #

North Korean children react to the photographer on the bank of the Yalu River near the North Korean town of Sinuiju, on December 16, 2006. #

A North Korean soldier stands guard along the bank of Yalu River near the North Korean town of Sinuiju, on May 1, 2014. #

North Koreans stand on the banks of the Yalu River, near the North Korean town of Sinuiju, on May 2, 2015. #

A North Korean soldier looks at a window as she stands along the bank of Yalu River near the North Korean town of Sinuiju, on September 19, 2013. #

A North Korean soldier points his weapon at the photographer as he trains on the bank of the Yalu River in the North Korean town of Sinuiju, on December 19, 2006. #

A North Korean soldier waves as a Chinese river-cruise boat passes by on the Yalu River at the North Korean town of Sinuiju, on October 9, 2006. #