Millions more people may be able to get smaller, lightweight Amazon packages delivered by drones by the end of the year under a plan the company announced Thursday to expand the airborne shipping to suburban areas in nearly 500 U.S. Key points and original sources are listed below.

• Millions more people may be able to get smaller, lightweight Amazon packages delivered by drones by the end of the year under a plan the company announced Thursday to expand the airborne shipping to suburban areas in nearly 500 U.S. citiesS1S2