At first glance, the group of 15 young Japanese and foreigners gathered together in the arrival lounge at Naha airport look like just another package tour for a week of fun on Okinawa's tropical beaches.
Drawing close enough to overhear their talk of nerve gas, land mines and unexploded bombs, however, it becomes clear that instead of working on their tans, they are more concerned about world peace.
These English teachers, interior designers and university students are taking part in a study trip organized by the group US for Okinawa to teach people about the environmental impact of American military bases on the islands.