(ANSA) - BELGRADE, OCT 13 - The defense ministers of 14 countries signed a declaration of intent to join NATO's joint air and missile defense through the European Skyshield Initiative (ESI) on the sidelines of a NATO meeting in Brussels, according to Slovenian news agency STA, citing German DPA. In addition to Germany and Slovenia, the document was signed by the United Kingdom, Slovakia, Norway, Latvia, Hungary, Bulgaria, Belgium, Czech Republic, Finland, Lithuania, Netherlands, and Romania, with Estonia expressing interest in joining. (ANSA).