In the years preceding world war i, europe was divided into two groups of nation-states, with each group united by treaty. germany, austria-hungary, and italy were opposed by russia, france, and great britain, which were known collectively as

The picture below shows president richard nixon and the first lady standing before the great wall of china in 1972. they are smiling - as are the chinese with them. when this picture was shown on american television, americans were aware that it was a historic moment. what are two reasons why this moment was important for both china and the united states?