KK1D (5455km) was the first USA spot on 10m WSPR today at 1304z. There have been several USA spots since. As well as Africa, West Indies and Russia, I have had several 10m WSPR spots from "near" Europe. These could, I guess, be F layer backscatter or possibly Es?
UPDATE 1730z: KC1AWS (5308km) is spotting me still.
UPDATE 2035z: KC1AWS (5308km) was the last USA station to spot me on 10m WSPR at 1812z. I went QRT on 6m many hours ago but am still active on 10m WSPR and may stay on overnight.