'Migrants cross vast stretch of sea to reach Europe'
19 April 2015 Last updated at 16:26 BST
Hundreds of migrants attempt to make the perilous journey across the Mediterranean from Africa and the Middle East to Europe.
While many make it, hundreds more do not, drowning as they attempt to make the crossing.
Richard Bilton travelled south of the Italian island of Lampedusa, to explain the scale of the journey they face.