What prompted early migration to north america and created a way for migrants to get there?   an increase in asia’s population an increase in asia’s food supply the melting of earth’s ice caps  the most recent ice age

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?