Cuba’s doctors are its biggest soft power export. Several Latin American countries are cutting ties

By Stefano Pozzebon, CNN Bogota, Colombia (CNN) — Hector Zelaya walks cautiously in an abandoned ophthalmology clinic in Honduras at the slow pace of someone who is still learning to see again. The stout, middle-aged man, was due to have cataract surgery in April at the clinic in Catacamas, which sits on the lowest slopes