North Korea tests nuclear device

Women in Tokyo read copies of a delivered extra edition of a Japanese newspaper reporting North Korea’s nuclear test.  (Itsuo Inouye / Associated Press)

North Koreans celebrate as they watch an announcer reading a statement on the country’s nuclear test on a large television screen in front of Pyongyang’s railway station.  (AFP / Getty Images)

South Korean soldiers patrol near the demilitarized zone of Panmunjom, South Korea.  (Ahn Young-joon / Associated Press)

A North Korean soldier reacts beside a river crossing on the Yalu River near the North Korean town of Sinuiju after the country conducted its third nuclear test.  (MARK RALSTON / AFP / Getty Images)

A protester in Seoul holds a picture of North Korean leader Kim Jong Un during an anti-North Korea rally following a report of the nuclear test conducted by North Korea.  (Lee Jin-man / Associated Press)

South Koreans use binoculars to look at the North Korea near the demilitarized zone of Panmunjom.  (Ahn Young-joon / Associated Press)

A North Korean soldier rides a bike beside a crossing of the Yalu River near the North Korean town of Sinuiju after the country conducted its third nuclear test.  (MARK RALSTON / AFP / Getty Images)

North Korea confirmed it had successfully carried out an underground nuclear test as a shallow earthquake with a magnitude of 4.9 was detected by several international monitoring agencies.  (Chung Sung-Jun / Getty Images)