For the second time in less than a month, suspected drone sightings have shut down a UK airport. On 8 January flights out of London Heathrow were suspended for over an hour. And between 19 and 21 December, more than 140,000 people at London Gatwick had their travel plans disrupted after drones were spotted above the airport. How can drones cause so much disruption? Airports operate on a just-in-time basis, with Heathrow moving a plane onto or off its runways every 45 seconds on average. A drone could interrupt this flow if planes have to reroute.

Radio jamming systems apparently thwarted an attempted presidential assassination with improvised drone bombs in Venezuela. On Saturday 4th August, President Nicolas Maduro's speech at an outdoor rally was interrupted by two explosions. Seven soldiers on parade were injured, three critically. Others scattered while bodyguards rushed to protect the president with bulletproof shields. Witnesses reported seeing two multicopter drones which crashed into a nearby apartment building and exploded.

Both the Tokyo police and the Human-Interactive Robotics Lab at Michigan Tech are using nets to catch smaller hostile drones. The idea is very simple: shoot a net or lure a drone into a net, entangling it. This electromagnetic field gun can safely bring drones down to the ground. However, it's not commercially available yet, and radio jammers are illegal in the US. DroneShield's Omnidirectional Sensor and Long-Range Sensor can remotely detect drones that are undetectable by radar.