The French presidential run-off on May 7 has been described as the most important in decades. The issues of immigration and the compatibility of Islam with French cultural values have played a prominent role in the campaign. Our guest Gilles Kepel is one of France's most distinguished experts on the Islamic and Arab world. He explains how he thinks the next French president should tackle the issue of home-grown terrorism. "Fixing the education system is a top priority", he tells FRANCE 24.