David Hatcher Childress was a guest on Coast to Coast AM a year ago. The title of the show was Did the Egyptians Visit the Grand Canyon 1000s of Years Ago? He said in the 1970s, the Brazilian Navy found an ancient Roman shipwreck off the coast of Rio de Janeiro.
When the Brazilian Navy went down to investigate, they found several Roman boats, and Roman coins. Later on, there was an issue because the Italian community began asking questions. They said history showed Romans discovered Brazil and should therefore be granted citizenship.
The Brazilian Navy was then ordered to bury the wreck.