Since the EU signed a deal with Turkey on March 18th, the number of migrants arriving on Greek islands has declined, but reports of people arriving from Libya have increased: in the first three months of the year, almost 15,000 migrants travelled from there to Italy. Former Italian Prime Minister Enrico Letta wants the EU to build a "toolbox" for a global solution. Former Italian Prime Minister Enrico Letta gives us his take on the migrant crisis, the terrorist threat and the possibility of a "Brexit".