The anonymous street artist Banksy has donated £205,000 from the sale of a protest piece to anti-arms campaigners. The artwork, Civilian Drone Strike, was on display at the Stop the Arms Fair art exhibition in east London. It depicts drones destroying a cartoon image of a house, while a child and her dog look on in distress. The exhibition was held alongside the world's largest arms fair, the Defence and Security Equipment International - both exhibitions closed on Friday. The art exhibition claimed to highlight "the inhumanity of the arms trade" through art, with work by more than 1,600 exhibitors from 54 countries.

This little drone captures and defeats rogue drones'Spiderman'-style. Just like how Spidey slings a web to capture bad guys, this little drone shoots a net to stop dangerous flying drones. Revealed this week at the Defence and Security Equipment International (DSEI) event, the world's largest defense and security show held biennially in London, this smart drone is already drawing a lot of buzz. Made by Dutch company Delft Dynamics, the DroneCatcher project is supported by the Royal Netherlands Marechaussee (Military Police), the Dutch National Police and the Dutch Ministry of Safety and Justice. The DroneCatcher is a multicopter – it has multiple blades and can shoot up vertically in the air, kind of like a tiny helicopter.

These are just a few of the latest military and security innovations from around the world on offer at the Defence and Security Equipment International Show (DSEI) in the U.K. this week. DSEI runs from Sept. 10 through Sept 15 at the Excel Center in London. The gigantic scale of biennial DSEI is often described as unrivalled. If you are a country looking to upgrade your military might then this "one stop shop" is the place to be. Pretty much anything you would need to defend your country in war – or to launch a war for that matter - is here in London at largest show of its kind on Earth.