Industrialization was the factor that contributed to the economic growth of the United states in the period from 1865 to 1920 and it aroused the most opposition. With industrialization came the urge for people to come to the cities for getting work. The people that came to work had to live in a very poor and unhealthy condition.
The space race was between the Soviet Union and the United States. The end goal was walking on moon, which is something that the United States managed to do, even though the soviets beat them in all other parts of the race like having the first man in space and having the first space walk. There are still nowadays many people who believe that the moon landing was fake and that the Soviets were actually the winners.
A flashback gives more of a reflective feel...that the author is almost reliving that certain experience. If you look into the flashback a little more, it could be biased because the character could just be remembering what he/she WANTS to remember, rather than what ACTUALLY happened. Comparing the actual chain of events in the book and viewing the character's flashback in a film is a great way to see those little differences in perspective.
In 1939, France and Great Britain declared war on Germany as a direct result of Germany invading Poland. Known as September Campaign in Poland and Poland Campaign in Germany, the invasion happened on September 1, 1939 which was followed by the Soviet Union invading the Poland on September 17, 1939. After failing to comply to Sir Henderson's (Great Britain's ambassador to Germany) ultimatum to cease the invasion, the Great Britain declared war on Germany with France following.