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2nd Great Migration
In the context of the 20th-century history of the United States, the Second Great Migration was the migration of more than five million African Americans from the South to the North, Midwest and West. It took place from 1941, through World War II, and lasted until 1970. -
G.I. Bill
The Servicemen's Readjustment Act of 1944, also known as the G.I. Bill, was a law that provided a range of benefits for returning World War II veterans (commonly referred to as G.I.s). It was designed by the American Legion, who helped push it through Congress by mobilizing its chapters (along with the Veterans of Foreign Wars). -
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Baby Boom
A baby boom is any period marked by a greatly increased birth rate. This demographic phenomenon is usually ascribed within certain geographical bounds. People born during such a period are often called baby boomers; however, some experts distinguish between those born during such demographic baby booms and those who identify with the overlapping cultural generations. -
Berlin Airlift
The Berlin Airlift, 1948–1949. At the end of the Second World War, U.S., British, and Soviet military forces divided and occupied Germany. Also divided into occupation zones, Berlin was located far inside Soviet-controlled eastern Germany. -
Air Conditioning
And in 1902, a 25-year-old engineer from New York named Willis Carrier invented the first modern air-conditioning system. The mechanical unit, which sent air through water-cooled coils, was not aimed at human comfort, however; it was designed to control humidity in the printing plant where he worked. -
Polio Vaccine
The first polio vaccine was the inactivated polio vaccine. It was developed by Jonas Salk and came into use in 1955. The oral polio vaccine was developed by Albert Sabin and came into commercial use in 1961. They are on the World Health Organization's List of Essential Medicines, the most effective and safe medicines needed in a health system. -
Creation of NASA
Creation of NASA. As a result of the space race between USA and the Soviet Union in the 1950s, NASA was created in 1958 from NACA (National Advisory Committee for Aeronautics, formed 1915) and other related organizations. -
Berlin Wall
The Berlin Wall (German: Berliner Mauer) was a guarded concrete barrier that physically and ideologically divided Berlin from 1961 to 1989.[1] Constructed by the German Democratic Republic (GDR, East Germany), starting on 13 August 1961, the Wall completely cut off (by land) West Berlin from surrounding East Germany and from East Berlin until government officials opened it in November 1989. -
Friendship 7
Mercury-Atlas 6 (MA-6) was the third human spaceflight for the U.S. and part of Project Mercury. Conducted by NASA on February 20, 1962, the mission was piloted by astronaut John Glenn, who performed three orbits of the Earth, making him the first U.S. astronaut to orbit the Earth.