Washington DC is the capital of the U.S.
Yes
Relations between the two superpowers deteriorated somewhat in 1960 when the Soviets shot down an American U-2 spy plane deep inside their territory. The following year, Khrushchev approved the construction of the Berlin Wall in order to stop East Germans from fleeing to capitalist West Germany.
The transcontinental railroad. Because of it, goods were able to be exchanged between the west and east and Chinese immigrants mainly worked on it.
