(ANSA) - BELGRADE, 16 OTT - "The European Union is confronted with extraordinary challenges that threaten its security, prosperity, and ability to act with authority on the international stage, with significant consequences for the lives of our citizens. No country on the continent - no one - can imagine a future distinct from the others: it would be an escape from reality and, more than an illusion, a self-defeating act." Sergio Mattarella, President of the Republic, said this while speaking at the Arraiolos summit in Slovenia. (ANSA).