李海上将是反对使用原子弹的；但是他的出发点是使用原子弹对促使日本无条件投降没有帮助

http://www.doug-long.com/leahy.htm

Leahy believed the atomic bomb would probably not work. After the atomic bombings of Japan, Leahy condemned the use of the atomic bomb for practical reasons:

• "It is my opinion that the use of this barbarous weapon at Hiroshima and Nagasaki was of no material assistance in our war against Japan. The Japanese were already defeated and ready to surrender because of the effective sea blockade and the successful bombing with conventional weapons." (William D. Leahy, I Was There, pg. 441).