Grenade body and aeroplane: what they have in common

1. Step 1. Grenade body — is part of — Grenade. A casing that produces fragments.
2. Step 2. Grenade — uses — Gunpowder. An explosive.
3. Step 3. Gunpowder — is used in — Cannon. A gunpowder charge.
4. Step 4. Cannon — is part of — Ironclad. Artillery.
5. Step 5. Ironclad — evolved into — Aircraft carrier. The first aircraft carriers were converted from battleships and cruisers.
6. Step 6. Aircraft carrier — uses — Aeroplane. Basing aircraft.

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