South Korean President Park Geun-Hye (C) walks past headstones at a cemetery to pay homage to the sailors who died when the naval vessel 'Cheonan' was sunk in 2010, during a ceremony in the central city of Daejeon on March 26, 2013. Forty-six sailors died after the naval vessel Cheonan was sunk by what Seoul insists was a North Korean submarine. Addressing a ceremony for the 46 sailors, South Korean President Park Geun-Hye warned Pyongyang that its only 'path to survival' lay in abandoning its nuclear and missile programs. AFP PHOTO / POOL/ KIM JAE-HWAN
In this handout image provided by the South Korean Presidential Blue House, South Korean President Park Geun-Hye weeps during an address to the nation about the sunken ferry Sewol at the presidential Blue House on May 19, 2014 in Seoul, South Korea.
South Korean President Park Geun-Hye speaks during the 96th Independence Movement Day ceremony at Sejong Art Center on March 1, 2015 in Seoul, South Korea. South Koreans celebrate the public holiday marking the 1919 civilian uprising against Japanese rule, which colonized the Korean peninsula from 1910-1945.
Australian Prime Minister Tony Abbott shakes hands with South Korean President Park Geun-Hye before their meeting at the presidential blue house on April 8, 2014 in Seoul, South Korea. This is a part of Tony Abbott's first official trip to north east Asia, making stops in Japan, South Korea, and China.
South Korean President Park Geun-Hye speaks during the 69th Independence Day ceremony at Sejong Art Center on August 15, 2014 in Seoul, South Korea. Korea was liberated from Japan's 35-year colonial rule in 1945.