It has been called the world's most deadly migration route. The sea crossing from Libya to Europe has claimed more than 2,000 lives so far this year - as desperate men, women and children crowd on to small boats in the hope of finding a new life.
They're put there by people smugglers - who exploit them for huge sums. Most of them are picked up by charity boats before being taken to ports in Italy. The whole process has become increasingly controversial, with the charities being forced to defend their actions.
The BBC's Joe Inwood spent nearly a month on board the biggest ship in the region, run by Doctors Without Borders.
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See full article here: http://www.bbc.co.uk/news/resources/idt-sh/migrants_in_the_mediterranean