What happens to an open pit mine once the mine is deemed depleted or useless for additional mining?

In shifting to a defense policy based upon the concept of "flexible response," president kennedy was indicating that he had grave doubts about thevalue of which previous defense policy? a massive retaliationb collective securityc containmentd air power

Why was control of the atlantic ocean essential to great britain’s success in world war 2

The chinese exclusion act was the first significant law restricting immigration into the united states. why do you think the us government singled out chinese immigrants in particular for exclusion?