NEW YORK — Oil prices surged 4% on June 30, with Brent settling above the psychological $50 a barrel mark, after a larger-than-expected drawdown in U.S. crude inventories.

Amazon has unveiled what its unmanned drones for package delivery would look like with a video launched on Nov. 29 on the prototype of technology it announced two years ago.

U.S. crude posted its biggest monthly drop since the 2008 financial crisis on July 31 after a string of losses in July triggered by China's stock market slump and signs that top Middle East producers were pumping crude at record levels.