I thought that the Abrams for Ukraine should be "new" downgraded export versions that should be build new. This seems to be "old" ones for Poland or for own use in NATO units for example in Lithuania.

If these are the ones specifically tailored for Ukraine, that was FAST! So fast, I question if they are indeed intended for Ukraine, as opposed to those previously ordered by Poland. A lot of pundits said it would take many months to provide the Ukrainian variant of the Abrams. If they are for Ukraine, the Abrams specific trucks need to be in place as well. Transport on rail would leave them too vulnerable a target.

This airport is Varna on the Black sea in Bulgaria. The truck is Bulgarian. May be the units are for training the Ukrainian soldiers on the American polygon in Bulgaria. The fuel is from Russian company Lukoil (the fuel tank on behind) which have a refinery in Burgas on the Black Sea too.

With the russian oil company Lukoil truck next to the C17 :) :) besides several guys are wearing shorts and t shirts, it is winter in Europe ! the trees have no leaves now, it is not in Europe or it is not now.