This video shows the intercontinental bilateral (with force-feedback) shared control of a group of quadrotor UAVs implemented using a network connection based on a VPN tunnel between Germany and South Korea.
The experimental testbed is described in 
See also the multi-robot/human bilateral control page for an overview on the topic.
- , “Experiments on Intercontinental Haptic Control of Multiple UAVs”, in 12th Int. Conf. on Intelligent Autonomous Systems, Jeju Island, Korea, 2012, pp. 227-238.