Employees of German postal and logistics group Deutsche Post DHL watch as a prototype "parcelcopter" prepares to land outside the DHL headquarters in Bonn Dec 9, 2013. DHL on Monday showed its prototype "parcelcopter," which is a modified microdrone that costs 40,000 euros ($54,900) and can carry packages up to 1.2 kg (2.65 pounds). [Photo/Agencies]