San José (AFP) – The United States homeland security secretary on Tuesday signed a deal to address migration in Central America during a visit to Costa Rica. The country is one of the main transit routes for migrants making their way north in the hope of reaching the US, and the American government has tried to deter people without documents from reaching its southern border with Mexico. According to the Costa Rican government, the agreement seeks to boost the fight against migrant smuggling and human trafficking, while exploring options to “strengthen current programs for the integration of m…