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The US DoD already has drones with these capabilities for recon in contested buildings and caves:

https://www.wired.com/story/shield-ai-quadcopter-military-dr...

Not sure if it's a fair comparison when the links you posted do not include any real evidence of flight agility or video of the actual drone. It's probably because of classified nature of this project, but still we don't know how similar these capabilities are.

Here’s a video of early testing for the previous generation Nova: https://vimeo.com/326968277

Newer models (Nova 2+) are much faster and explore in multi-level buildings.

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