By THE STAR STAFF Every airport in the United States, including Mercedita International Airport in the municipality of Ponce, that receives federal funds and generates revenue as a result of those allocations, must reinvest the funds to cover operational costs, structural improvements, and maintenance at that facility. That fact of regulation was confirmed by Puerto Rico Ports Authority Executive Director Norberto Negrón earlier this week. “Every airport under the administration of the Ports...