Photo taken on March 6, 2016 shows two unmanned devices from China North Industries Corporation on display at the second Unmanned Systems Exhibition & Conference in Abu Dhabi, United Arab Emirates. (Xinhua/An Jiang)

The second Unmanned Systems Exhibition & Conference, an event of Abu Dhabi Aviation and Aerospace week, opened on March 6, 2016 in Abu Dhabi, United Arab Emirates. The exhibition and conference focuses on innovation and discusses how advanced drones can benefit national defense, security and other civilian fields.