TEHRAN, July 30, YJC - Hot air balloons from across the globe have lit up the sky in Italy in one of the world's biggest ballooning events. Organizers described the occasion as the "most relaxed" event on the international ballooning calendar. Around 60 hot air balloons lined up at an airstrip near Terni and fired up into the sky. The event stretches over ten days and features occasions for the balloonists to socialize, often over local food.