Neutron initiator and r-7 rocket: what they have in common

1. Step 1. Neutron initiator — is part of — Nuclear weapon. It starts the chain reaction.
2. Step 2. Nuclear weapon — works like — Nuclear reactor. The same physics: a controlled and an uncontrolled chain reaction.
3. Step 3. Nuclear reactor — is part of — Nuclear power plant. The reactor heats the coolant.
4. Step 4. Nuclear power plant — is made of — Concrete. The containment is concrete.
5. Step 5. Concrete — is material for — Launch complex. The launch table is concrete.
6. Step 6. Launch complex — is used in — R-7 rocket. Baikonur.

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