Sword pommel and rocket: what they have in common

1. Step 1. Sword pommel — is part of — Sword. A counterweight at the end of the handle.
2. Step 2. Sword — has part — Steel blade. The blade.
3. Step 3. Steel blade — is part of — Bayonet. The bayonet blade.
4. Step 4. Bayonet — is part of — Musket. A bayonet.
5. Step 5. Musket — uses — Gunpowder. Gunpowder propels the bullet.
6. Step 6. Gunpowder — is used in — Rocket. The first rockets were powered by gunpowder.

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