It happened on a… February 11

2013

Pope Benedict XVI announces his resignation from February 28, the first pope to resign since 1415.

2011

The first wave of the Egyptian revolution culminates in the resignation of Hosni Mubarak and the transfer of power to the Supreme Military Council after 18 days of protests.

1990

Nelson Mandela released after 27 years imprisonment in South Africa.

1971

87 countries, including Canada, the United States, United Kingdom, and Soviet Union, sign the Seabed Arms Control Treaty outlawing nuclear weapons on the ocean floor in international waters.