By Soo-hyang Choi and Hyonhee Shin SEOUL (Reuters) -North Korea fired a ballistic missile toward the sea off its east coast on Wednesday, South Korea and Japan said, about a week after Pyongyang vowed to develop its nuclear forces “at the fastest possible speed”. The North’s 14th known weapons test this year comes days before the South’s new president, Yoon Suk-yeol, takes office on May 10. North Korea’s last test, on April 16, involved a new tactical guided weapon aimed at boosting its nuclear capability. South Korea’s Joint Chiefs of Staff (JCS) said it detected the launch at about noon in t…