Alamogordo Test Range, Jornada del Muerto desert. The first atom bomb test is successful. The yield of the explosion is 22 kiloton, more than expected. Sunday, June 17 1945 Pentagon President Truman is advised by his staff to use atom bombs on Japan. This may put an end to the war against Japan quickly. The Allies can then concentrate on defeating Germany. There is a possibility that an atom bomb used on Germany fails to explode and is recovered. This would give the Germans vital technological information. Truman agrees that Japan should be used for a field test. Thursday, June 21 1945 Okinawa