Kosovo was the newest country that declared independence from Serbia.
For continental U.S. the answer is never. Since the earth's rotation axis is tilted 23.5 degrees with respect to its orbital motion around the su, one would have to be less than 23.5 degrees above or below the equator to have the sun pass direclty overhead
C. a diversely populated country
Russia is not a diversely populated country..
B, peeblo people in new mexico revolted