The document provides summaries of several famous photos from the 20th century between 1900-1939, including:
1) The Exposition Universelle of 1900 in Paris which unveiled talking films and new technologies and attracted over 50 million visitors.
2) A 1900 photo showing female telephone operators dressed in white dresses and black skirts manually operating switchboards.
3) The Wright brothers' first powered flight on December 17, 1903, lasting 12 seconds - a breakthrough in aviation.
4) Josephine Baker, an African American entertainer who rose to fame in France in the early 20th century and helped the French resistance in World War II.