[01100011]

That's the first thing I thought of when I heard about this. If the US was testing its drones, I think it would prefer to keep them in a restricted airspace. On the other hand, if I were a foreign power looking to flaunt my new drone tech, I'd take it over the area that seems to be rife with sensitive bases.

Still, it's most likely this is a US drone on a long range testing mission(or just flying off course due to a sw bug).

[koheripbal]

For hypersonic vehicles, restricted airspace is too small. They need to be able to fly into commercial airspace to demonstrate range, guidance systems, etc...

[ianai]

Are there reports of any foreign drones flying so far within US borders? I only recall media accounts of stuff like that happening in international waters or borders.

[heavyset_go]

Sounds like a situation where if there were any witnesses to such incidents, they're probably under gag orders.