was the Iran-Contra scandal in the 1980ís that put mysterious
events on the map in Nicaragua during the Ronald Reagan presidency.
The USA was illegally selling weapons to Iran (a stated enemy
of the USA) and using the proceeds to secretly arm and fund the
Nicaraguan Contra forces attempting to overthrow the Sandinista
government. Oliver North was the stool pigeon stopping the full
mystery from unravelling up to presidential level.
pre-Columbian rock art: petroglyphs.