Churchill's Bomb: How The United States Overtoo... Apr 2026

In the early years of the war (1940–1941), the United Kingdom was actually the world leader in nuclear research. While the U.S. was still skeptical, British scientists—bolstered by refugees from Nazi Europe like Otto Frisch and Rudolf Peierls—proved that a "super-bomb" using U-235 was theoretically possible. This research was codified in the , which Churchill shared with President Roosevelt, essentially jump-starting the American effort. The Quebec Agreement and the Shift in Power

Left out in the cold, the British government decided they could not afford to be a second-tier power. In 1947, they began their own independent program, eventually detonating their first atomic device in 1952. By then, however, the United States had already moved on to the Hydrogen Bomb, cementing its status as the world’s lone nuclear superpower for a time. Churchill's Bomb: How the United States Overtoo...

As the war progressed, the sheer cost and vulnerability of building massive enrichment plants in the UK became prohibitive due to German bombing. In 1943, Churchill and Roosevelt signed the , which integrated British scientists into the American "Manhattan Project." However, this partnership was never truly equal: In the early years of the war (1940–1941),