What was the economic decline called from 1929 until World War II began?

Great Depression

The Maasai Mara wildlife reserve lies in which African country? What city became the first capital of the United States after independence? What brand of jeans does Rachel claim Ross wears unstylishly? Who painted "American Gothic"? In the Pokémon games, which group of criminals famously attempts to capture rare Pokémon like Pikachu?