Upon mention of the Caribbean, most people think of idyllic white-sand beaches, Hollywood pirates, the magical sound of steel drums, a handsomely crafted rum cocktail. But the region ringed by Central America, the northern coast of South America and an arc of island nations stretching toward the tip of South Florida – is more than a picturesque vacation spot. It is becoming a key jumping-off point for cargo flights between the Americas and the rest of the world, including Europe, Africa and now the Middle East.