Key elements of a UAV, which is also sometimes called a drone, are the processors located on the vehicle, which is controlled from ground stations. A UAV has been designed with aerodynamic structures that have multi role capability when coupled with the right navigation systems. First, the technology was introduced in a number of military activities in order to make perilous military activities reduce the threats of human lives being lost during the operation. Military UAVs have missiles that are operated from high distances and intended for hitting certain objectives. The military then uses liquid hydrogen fuel that is altered to power UAVs that are modified for long-range operations against enemy forces.