Originally developed in the early 20th century for military purposes, unmanned aircraft, or drones, have come to be used for a variety of purposes.Readers (Grades 3-5) will find out how drones work and what it takes to pilot them. They will also learn why the use of drones has become a...
ترست بايلوت
منذ يوم واحد
منذ 3 أسابيع
منذ يومين
منذ شهر