Marrakesh (Morocco) (AFP) – Exactly 25 years after the Arab Maghreb Union (UMA) of North African states was formed in Marrakesh, business leaders gathered here Monday lamented its failure to integrate the region. The five countries that make up the UMA — Morocco, Algeria, Tunisia, Libya and Mauritania — have a total population of 90 million and had an estimated GDP of 430 billion dollars in 2012, according to Morocco’s central bank chief Abdellatif Jouahri.