Japanese Police Drone 警察のドローン
https://youtu.be/Ji-1_33_5Ck
April 22, 2015 a drone carrying radioactive sand landed on the Prime Minister's office.
In response to this invasion, the Japanese Police have created their own Drone to capture other Drones!
Police Drone Story:
http://www.huffingtonpost.com/entry/could-tokyos-net-equipped-drones-be-the-solution-to-drone-threats_566b08c5e4b009377b24c832
Original Drone landing story
http://www.cnn.com/2015/04/22/asia/japan-prime-minister-rooftop-drone/