.John Kennedy, Richard Nixon , George Bush are American presedents of the 20 centure. 2. They made in the USA. 3. Mississippi River are mighty river in America. The length of 3950 km. 4.,? 5. Because America has many kinds of land- rocky coasts, dry empty deserts, wide plains etc. 6. Because it is so big that you must go there yourself to feel its true size and beauty.