London's airports don't want a repeat of the drone panic that left Gatwick travelers grounded for days, and they're willing to spend loads of cash to keep their skies safe. Heathrow and Gatwick have spent millions of pounds on "military-grade" anti-drone systems in the wake of the scare. It's not clear what they've purchased, but it might be a Rafael Drone Dome system that can jam drone communications. The company told the Times that it had seen interest from UK customers, but it's not clear if that included the two airports. It's still unclear how much of a threat drones posed during the Gatwick incident, or if the owners even intended anything malicious.