How did americans re-emerge after the civil war and rebuild a nation torn apart by war and prejudice?

It did not.

America, sadly, is still feeling the effects of the Civil War through problematic policing and racist housing parties.

This is a result of a policy of reconstruction that was ultimately discarded to help broker a political peace. The South was given back the keys to the kingdom quickly after committing treason and newly freed slaves were subjected to Jim Crow laws.

the answer is a glaciers carved a large valley that later flooded and became puget sound

one of the negative side effects were the economic losses the events of september 11th caused. many, many people lost their jobs as a result of a downturn in the economy after the terrorist attacks.