Shortly before leaving for Kathmandu, Nepal, mountaineer Oh Eun-sun Monday confirms her determination to become the world`s first woman to conquer the world`s 14th-highest peak of Annapurna (8,091 meters) in the Himalayas at Incheon International Airport. After undergoing training to adapt to high altitude, Oh will set up a base camp early next month and attempt her climb in late April at the earliest.