April 21, 1989 After the death of Chinese reform figure, Hu Yaobang, tens of thousands of people crowd into Beijing’s Tiananmen Square, cheering students who wave banners demanding greater political freedoms.

April 22, 1961 An uprising of French parachutists, led by General Salan/Challe in Algeria.

April 22, 1970 The first Earth Day and Earth Week is celebrated.

April 23, 1974 Pan American Airways’ Boeing 707 plane crashes in Bali, kil