The U.S. general who directed the Manhattan Project and met Niels Bohr in Washington in 1943 was Leslie Groves.
Brigadier General Leslie R. Groves Jr. was appointed to lead the Manhattan Engineer District in September 1942. He was an Army engineer and organizer rather than the project’s principal scientific director, but he coordinated the enormous industrial, military, and scientific effort that produced the first atomic weapons.
Bohr arrived in Washington, D.C., on 8 December 1943 as a consultant connected with the British mission. Groves met him there and later invited him to visit Manhattan Project facilities, including Los Alamos, where nuclear weapons were being designed. For security, Bohr travelled under the name Nicholas Baker, while his son Aage used James Baker.
The distractors represent important figures but not the requested role. Robert Oppenheimer directed the scientific work at Los Alamos; Vannevar Bush oversaw major U.S. wartime research administration; and James Chadwick was a British physicist who led the British Mission. Leslie Groves was the military head of the project.