One of the most significant challenges is building an airplane had to do with "propulsion", since the technology that allowed motors to have enough energy to lift an airplane into the sky with a passenger wasn't available for most of history.
Answer:
D. the Soviet Union
Explanation:
The Soveit Union supported Cuban Communists such as Fidel Castro and would later import their nukes in the country to fire at the U.S.
Answer:
Carpetbaggers
Explanation:
Northern who came to the south during reconstruction were known as carpet baggers, because they came to the south to become rich and take all their money back north.
