Why did the students protesters sit outside the Demorcratic National Convention'

How did the completion of the transcontinental railroad change the lives of american citizens? a-it increased the wealth of all americans and enabled them to travel more.b-it made cross-country travel too expensive for ordinary americans.c-it decreased the safety of americans who moved to settle the plains.d-it shortened travel time between the east and west for all americans.

What was the significance other than the obvious harm to us forces of the terror attack on the uss cole in 2000

How is the vietnam war connected to the cold war?