What was the main goal of the pan-african movement?

What do historians call the political,social,or cultural circumstances surrounding an event?

How did inca develop their road system? a) they used mortar to hold the stones together.b) they built suspension bridges over rivers. c) they mixed copper and stone together to make the blocks.d) they laid roads in the cities, not in the less densely populated deserts.

What was the “u-2 incident” and how did it affect u.s./soviet relations in 1960?