Slaves were shipped mainly from Africa to the U.S through the Atlantic Ocean, then sold to mansions where they worked for the rest of their lives.
The answer is Publick Occurences
Truman implemented this in response to two threats one being a communist-led uprising against the government in Greece and two being Soviet demands for some control of Turkey's Dardanelles. It was implemented in Berlin when Truman ordered U.S. planes to fly supplies to the people of West Berlin in response to the Soviet Union's 11 month blockade on Berlin.. or something among those lines