[On Russia, Saudi Arabia and oil prices] This is testing out what prices everyone can live with, and it sounds like the Russians can live with prices slightly lower than what the Saudis want to live with. How durable is this Russia-Saudi agreement? They made it under some serious duress after the price drops from 2014-16, and they didn't have much choice. Do their interests align over the long term? We may begin to see the answer as they begin to chat at the G20.