(21.Mai 2014) “To the best of our knowledge, these systems aren’t operational,” Tsur Dvir, marketing officer for Aeronautics Defense Systems, a firm based south of Tel Aviv, Israel that supplied Nigeria with Aerostar unmanned aerial vehicles, told Reuters yesterday. Dvir, speaking on the sidelines of a conference organised by Israel Defense magazine, told Reuters that since the drones were purchased several years ago, Nigerian clients had not commissioned Aeronautics to carry out any routine maintenance.