It was very close to the end of the European part of World War II, just a few weeks before it culminated in the suicide of Adolph Hitler.
At the time he took office, Harry Truman knew nothing about the ongoing development of the atomic bomb.
Do you mean the "president"? In the United States, if the president dies while in office, the vice president becomes president. When President Franklin D. Roosevelt died, for example, Harry Truman (the vice president at the time) became president.
Harry S. Truman, the 33rd President, took office after Roosevelt died near the end of the war.
If he dies in office, then Dick Cheney becomes President.
The vice president
The Vice President
The vice-president
the vice president.
If both die then the Speaker of the House becomes president
The vice-president becomes the president.
If Obama dies in office, his vice President, Joe Biden, becomes the next President.
President pro tempore of the Senate becomes President.
When the president dies the vice president becomes the president