Coming in at number two is Australian hard rock group AC/DC's thundering 'Back in Black' of 1980, which has sold more than 49 million units. Here Brian Johnson (l.) and Angus Young perform at Stade de France, Paris, in 2001.
PHOTO: Nascimbeni/DAPR/ZUMA Press/Newscom/File
Obama talks drones: Will it increase transparency for Pentagon to take lead?
Meet the Wisconsin teen behind today's Doodle 4 Google (+video)
© The Christian Science Monitor. All Rights Reserved.
