South Korean President Park Geun-hye met with German President Joachim Gauck on Wednesday as she began the first full day of her state visit to the European nation that she believes could help her chart a course toward unification with North Korea. Park arrived in Berlin on Tuesday night from The Hague where she attended an international anti-nuclear terrorism conference and held a series of meetings on its sidelines, including trilateral talks with U.S. President Barack Obama and Japanese Prime Minister Shinzo Abe.