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Incredibly awesome stuff!!!
The things that are actually and potentially possible with with both tech and nanotech is simply mindboggling.
I'm especially fascinated by below:

They might rebuild amputated body part, disarm bombs, perform micro operation on intricate body parts and even self replicate when needed.

Great write up executed.
Well done.

Technology has done a lot for humans. Imagine a world without phones, Facebook, Whatsapp, Steemit, Google, Laptops etc. Technology has liberated man from a lot of suffering that would have been inevitable. Despite the fact that it has its own disadvantage but it is still cool.