Harriet Tubman on $20 Bill

Reaction to the US Treasury's announcement that anti slavery activist, Harriet Tubman will be the first woman to appear on a US banknote for more than a century. And what's it like in Nigeria where a petrol shortage is crippling the country

Image: An image of Harriet Tubman, between 1860 and 1875.
Credit: H.B. Lindsley/Library of Congress/AP