When Harry Truman Roosevelt's vice president became president after Roosevelt's death he had to be told?

When Harry Truman became president following Franklin D. Roosevelt's death in April 1945, he was informed of his new role during a meeting at the White House. Truman was initially unaware of the full extent of Roosevelt's failing health and the challenges facing the nation, including the ongoing World War II. This transition marked a significant moment in U.S. history, as Truman would soon make critical decisions regarding the war and post-war policies.