What message does President Donald Trump's stance on Saudi Arabia send to other nations? A terrible one, says New Yorker writer Robin Wright. Also, the Greek town of Mati was devastated by fire this summer. Now young people from Mati are sending a message of solidarity to people displaced by the Camp Fire in California. Plus, how blockchain technology could track romaine lettuce and other produce through the global supply chain and, in the process, help make our food safer.