Answer:
The United States no longer had the advantage of atomic weapons.
Step-by-step explanation:
The development of atomic weapons by the Soviet Union was significant because it ended the United States monopoly on nuclear weapons and shifted the global power balance. Prior to this, the United States had been the only country with nuclear capabilities, giving it a significant advantage in international relations. However, with the Soviet Union's development of atomic weapons, this advantage was lost, and both countries became embroiled in an arms race. This development also increased tensions between the two countries and contributed to the Cold War, a period of geopolitical tension between the United States and the Soviet Union.