China's foreign minister has resigned. In recent months, other high level officials have been purged from power in China, including the defense minister and several army generals. But why? Plus, Greenland is imposing a "green tax" on the cruise ship industry. Tourism is important for Greenland's economy. But there are concerns about the impact of the tourist business on the island's environment. And camel racing on the Arabian Peninsula goes back to the 7th century. These days, it's still hugely popular, with robot jockeys and cash prizes. But a new team is taking camel racing back to its roots, with a twist.