The correct answer is:
Law enforcer of the Western Hemisphere was the role of the United States as envisioned by the Roosevelt Corollary to the Monroe Doctrine.
The Roosevelt Corollary, consistent with his Big Stick Diplomacy, was written in 1904 after the Venezuela Crisis of 1902–03, as an addition to the Monroe Doctrine.
It stated that the US would intervene in conflicts between European and Latin American countries to enforce legitimate European claims, instead of having them pressing their claims directly.
I'm not sure what you mean by "historically", but there are many key features of London:
Big Ben
Buckingham Palace
the Thames River
London Bridge
London Eye
Trafalgar Square
Hyde Park
Westminster Abbey
the Globe Theater
Answer:
The answer is: A central data hub for a "smart" city.
Explanation:
I got 100% on Gradpoint.
It is the United States "Senate" that limits the president's ability to nominate federal judges, since one of the jobs of the Senate is to "confirm or deny" such appointments.
After the loss and withdraw of American troops from South Vietnam in 1976 during the Fall of Saigon the Viet Cong pushed into Saigon and took control of South Vietnam. Thus ending the "war" and South Vietnam being reunited with the North under one communist government