A 'Hunter' Unmanned Aerial System is displayed during an official presentation by the German and U.S. Unmanned Aerial Systems (UAS) at the U.S. military base in Vilseck-Grafenwoehr October 8, 2013. The drone has a wing-spread of 10.44 metres, an aircraft speed of about 185 km/h and was used first time 1999 in Kosovo. REUTERS/Michaela Rehle (GERMANY - Tags: MILITARY)