1. Luis Guillermo Solís Rivera, President of Costa Rica Author: Luis Guillermo Solís Rivera Publication Date: 09-2017 Content Type: Video Institution: Columbia University World Leaders Forum Abstract: His Excellency Luis Guillermo Solís Rivera, President of the Republic of Costa Rica, addresses the Columbia University World Leaders Forum in Low Library. Topic: Nuclear Weapons, Treaties and Agreements, and United Nations Political Geography: New York, Central America, and Costa Rica