The Eisenhower Doctrine, given in a message to Congress on January 5, 1957 stated the United States would use armed forces upon request in response to imminent or actual aggression from Communist forces in the Middle East. The Doctrine was applied in Lebanon that year, justifying American intervention.
... Iguaçu[?] falls, the Rio Negro, São Francisco[?], Xingu, Madeira and the Tapajós[?] rivers.
Situated along the equator, Brazil's climate is predominantly ...