The big thing was having permeable borders. The Ukrainians were able to get the drones on trucks deep into Russian territory before launching them. If you look at the Russian border, it’s gigantic, and there are probably many weak points that an enemy could penetrate.
Here in the US, it would not be so easy for China to sneak in drones. Using shipping containers would be possible, but very risky unless they had help inside the US. But there’s no way to drive a truck from China to California.
Knowing that the US has super secure borders is what helps me sleep at night.
Another reason why all the Chinese foreign “students” need to be deported back to China immediately.
You could just build them in the USA.
Or ship them in unassembled from temu or eBay.
Not that hard