The Duke and Duchess of Cambridge have arrived at the National Portrait Gallery.
The first official portrait of the Duchess is set to unveiled this morning.
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More is needed to help overcome poverty and inequality in New Orleans, 10 years after Hurricane Katrina devastated the area, Obama has said.
WARNING: Some people may find images upsetting.
Hundreds of people are feared to have drowned after a boat packed with migrants sank off the coast of Libya, trapping many in the hold.