An air filter designed for those down voting your comment:

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Then wouldn’t it be the Golden State-Gate Bridge?

25 years? This is asklemmy, not unpopularopinion.

Frostpunk is pretty similar. If the gameplay is slightly harder than you can keep up with its essentially exactly that scenario.

On the other hand if the drone always flies home as soon as it approaches, mission still accomplished?

You can definitely get balls filled with grease, pretty commonly used for utilities. Link below is just a site I found, not actually sure how to order them.

https://www.cmgelectricsupply.com/results-lubricating-capsules

Expansionism is a subset of imperialism. Imperialism (the word and the actual behavior) existed before Lenin described imperialism under capitalism.