Work by Pablo Picasso
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Picasso's shades of grey and other art stories

10 October 2012 Last updated at 21:37 BST

A new exhibition at New York's Guggenheim Museum focuses on Picasso's use the of the black and white palette, Washington hosts the first big US show of Chinese artist Ai Weiwei, and other art stories from around the world.

Samreen Naz reports.