A 1987 heat wave in Turkey convinced Irwin to change his mind and return for his seventh expedition to Mount Ararat. He believed the warm temperatures might have melted enough of the mountain's glaciers to make Noah's Ark easier to spot from the air. Irwin's High Flight Foundation teamed with the Institute for Creation Research, Evangelische Omroep, and International Exploration, Inc. for a joint operation. According to ICR's John D. Morris, the Turkish government had banned exploration of Ararat earlier in the year, and only approved this expedition on the condition that the team also evaluate the Durupınar site. Permits to explore Ararat itself were revoked before the party could begin its intended mission. Ultimately the expedition was only able to arrange a high-altitude aerial survey, staying no less than from Soviet and Iranian airspace.