Quadcopter (drone) and electrical telegraph: what they have in common

1. Step 1. Quadcopter (drone) — has part — Smartphone camera. A camera.
2. Step 2. Smartphone camera — is part of — Weather satellite. Cameras.
3. Step 3. Weather satellite — is used in — Weather forecast. Satellites.
4. Step 4. Weather forecast — uses — Electrical telegraph. Collecting reports by telegraph.

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