On the evening of May 23rd, 1945, in the Japanese town of Chiran, Masanobu Kuno sat down and hand-wrote this farewell letter to his 5-year-old son, Masanori, and 2-year-old daughter, Kiyoko; the next day, he proudly boarded his explosive-laden aircraft, took to the skies, and deliberately flew his plane into an Allied warship as part of the Battle of Ok…