As an air traffic controller
To get passengers to a destination
I want to instruct a plane to land at an airport and confirm that it has landed

As an air traffic controller
To get passengers to a destination
I want to instruct a plane to take off from an airport and confirm that it is no longer in the airport

As an air traffic controller
To ensure safety
I want to prevent takeoff when weather is stormy

As an air traffic controller
To ensure safety
I want to prevent landing when weather is stormy