Before revision: Unmanned Aerial Vehicle (UAV) surveillance aircraft have been "deployed or are under development in many countries, including Israel, the UK, the United States, Canada, China, India, South Africa and Pakistan."
After revision: Iran,Unmanned Aerial Vehicle (UAV) surveillance aircraft have been "deployed or are under development in many countries, including Israel, the UK, the United States, Canada, China, India, South Africa and Pakistan."