[fotbr]

On the other hand, the US used an early cruise missle to deliver mail as a publicity stunt, and it did require landing[1].

IIRC the regulus system was developed as a reusable airframe to keep development costs low.

[1]https://postalmuseum.si.edu/collections/object-spotlight/reg...

[sandworm101]

If it has the ability to land, id call that a drone.