One of the main reasons that the Three Gorges dam was built was to prevent flooding further downstream. The need for a dam was highlighted in 1954 when people were killed as a result of flooding of the Yangtze River.
Arab Spring refers to the democratic uprisings that arose independently and spread across the Arab world in 2011. The movement originated in Tunisia in December 2010 and quickly took hold in Egypt, Libya, Syria, Yemen, Bahrain, Saudi Arabia, and Jordan.
On October 6th, 1973, the Jewish state of Israel was attacked by the coordinated forces of Egypt and Syria, with an additional nine Arab states actively supporting the actions of Egypt and Syria. The launch of the attack came on the holiest day of the Jewish calendar, Yom Kippur, which the war later became known as.