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Stretching some 30,000 mi (48,000 km), the Pan-American Highway is a system of roads connecting North and South America. Originally conceived as a single route in 1923, it was financed by the US during the 1940s and 1950s and grew to include a number of designated highways in participating countries, extending from Alaska and Canada to Chile, Argentina, and Brazil. However, the system is far from uniform; some stretches are passable only during the dry season, and there are gaps where? Discuss
Source: The Free Dictionary