What role did john adams play after the boston massacre and why

How is the president involved in the process of bills becoming laws?

What are three supporting points as to why opium was wrong in the chinese trade? why should it have stopped? (opium wars)

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?