Watch: Mauna Loa joins Kilauea to create rare "duel-eruption" event in Hawaii

Watch: Mauna Loa joins Kilauea to create rare "duel-eruption" event in Hawaii

Officials at Hawaii Volcanoes National Park expects an influx of visitors to the park in order to catch a glimpse of Mauna Loa and Kilauea during a rare duel-eruption event.