(FILES) A file photo taken on February 26, 2015 shows former South Korean President Park Geun-Hye at the presidential Blue House in Seoul. North Korea threatened on June 28, 2017 to "impose the death penalty" on the South's former president Park Geun-Hye over an alleged plot to assassinate its leader Kim Jong-Un. / AFP PHOTO / POOL / ED JONES / XGTY