On this day in history - July 21

What Happened On This Day – July 21

• 2011 STS-135 lands

  This space shuttle was the 135th and the last space shuttle flight of American Space Shuttle program.

• 1983 Lowest temperature ever measured on Earth

  Vostok Station, a Russian station on Antarctica experienced the lowest temperatures ever measured in recorded human history. The temperatures fell to −128.6 °F (−89.2 °C)

• 1980 Mary Eugenia Charles is elected as PM of Dominica

  Her election to office made her the first female and the longest PM of the Commonwealth of Dominica. She is also the first elected female head of state in the Americas.

• 1977 Libyan–Egyptian War begins

  This short war between Libya and Egypt started with Libya striking Egyptian cities. The war lasted for 2 days with a ceasefire on July 24.

• 1969 First person walks on the Moon

  Neil Armstrong became the first person to walk on the Moon. He stepped on the Moon's surface almost 7 hours after Apollo 11, the space craft that carried them, landed on the Sea of Traquility on the Moon. After stepping on the Moon, Armstrong uttered his famous words, "one small step for [a] man, one giant leap for mankind."