Cassia Mendes, who has worked as a housekeeper for more than 20 years, cleans a house in Sao Paulo, Brazil, on Feb. 19, 2012. Brazil enacted on April 2 a constitutional amendment to grant domestic workers health insurance and other benefits.
On June 5, 1944, Jake McNiece (right) led a group of paratroopers in World War II. After he shaved his head and painted his face before dropping behind German lines for D-Day, the look caught on with his men.
A portrait of Italian philosopher, writer and politician Niccolo Machiavelli (Florence, 1469-1527) by Antonio Maria Crespi. Half a millennium after he wrote The Prince, the slim volume continues to play an important role in political thought and evoke strong response.
Veneranda Biblioteca Ambrosiana/De Agostini/Getty Images