Why were the Americans shocked when the Soviets detonated an atomic bomb?

Why were the Americans shocked when the Soviets detonated an atomic bomb?

Explanation:

When the Soviet Union exploded its first atomic bomb in 1949, the United States reacted how, and why? The U.S. wanted to build a more powerful weapon to maintain control and power. ... The Guatemalan head of government gave American owned land in Guatemala to peasants.

the great wall of china worked as a defense for the feudal states of the zhou dynasty to the north. during the warring states period more walls were put up to defend the borders of the different kingdoms. it was semi successful because despite the wall, the mongols eventually conquered china also the great wall provided protection to the economic development and cultural progress, safeguarded the trading routes such as the silk road, and secured transmission of information and transportation. @jayxboof