Answer: The correct answer is the desegregation of Little Rock's Central High School by 9 African American students, who became known as the "Little Rock 9," on September 4, 1957.
Explanation: In 1954, the U.S. Supreme Court issued the famous Brown v Board of Education, which declared that segregated schools were unconstitutional. The Governor of Arkansas, Faubus, refused to obey the written law and called in the Arkansas National Guard to "keep the peace." The National Guard refused to allow the "Little Rock 9," to enter the school. President Dwight Eisenhower however intervened, and nationalized the National Guard and ordered them to not only get the students into the school but also to protect them.
A major motivation behind the United States’ decision to purchase Alaska was the established seal fishery industry in the territory promised economic benefits.
