A couple of Article sites which may be of interest.

[kiwiruna]

I've just been linked to these from Military History not Visualised over on Youtube

balloonstodrones.com/

From their site..., exploring the development of air power from the earliest days of flight to now and the future.

and

centralblue.williamsfoundation.org.au/

Both seemed interesting so I thought I'd share them.

[mcmaster]

Thanks. the Williams foundation ones do make you think what weird and dangerous times we are in. Ascendant China and Russia and a leader of the free world hell bent on ripping apart the Western alliance. Seatbelts on.