The US Patriot battery PAC-2 missiles can be used agains drones. A unit at Al-Udeid in 2015 made this clear when it was noted that it could defend against "tactical ballistic missiles and drones."
Tag: PAC-2
Drone Wars: The book
"A riveting account of one of the most significant developments in contemporary warfare – the evolution and proliferation of drones. This is a very important book." – General David Petraeus, US Army (Ret.), former Commander of the Surge in Iraq, US Central Command, and Coalition and US Forces in Afghanistan, and former Director of the CIA
Drone Wars: The book 