The Cold War.
it gave the Soviets proof we were spying on them
The Rosenbergs were involved in the Manhattan Project which designed and made the first atomic bomb. They spied for the Soviet Union and passed the information to the Soviet Union on how to make an atomic bomb. They were caught and were executed for spying. With the breakup of the Soviet Union, the great value of their spying to the Soviet Atomic Bomb program was revealed.
A Soviet diplomat claimed his country was spying on Australia
Show down the Soviet Union??? Or shot down IN the Soviet Union? Are you asking about Gary Francis Powers?
The U2 spy plane with Gary Powers at the controls
Alger hiss
Robert Hanssen
Ethel and Julius Rosenburg were guilty of spying for the Soviet Union. An put to death.
the electrocution of the Rosenbergs, a husband and wife who were convicted of spying for the Soviet Union and sentenced to death
spying for the Soviet Union to help them build an atomic bomb.
There has been spying going on between nations for a long time but actual organized spying on the Soviet Union began after world war one and then really got serious after world war two.
U2 Spy planes took arial photographs