According to question, in Tlatelolco, Mexico government kill over 500 student protesters in 1968 on the eve of the opening of the Olympic games.
In the US, the people relocated to what is known as the Sun Belt. Many residents preferred the Sunbelt's nicer weather and sunshine over the Rustbelt's lower temperatures and snowfall. As people relocated to better places, there was mass migration.
Traditional theories for the growth include rising productivity in the South and West and rising interest in Sunbelt amenities, particularly the region's agreeable climate. Another key driver of migration is the reduction in employment in the Rust Belt. Americans looking to move their families were most likely to choose the "Sunbelt," as it became called. The Sunbelt is a group of states that stretches from Virginia through California in the north, to Texas to the west, and through Florida to the south.
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