Wallonia, Belgium, today.
I stumbled upon a plant covered with small bundles of aphids, and sure enough, upon closer inspection, it had a whole aphid farming operation going on, and ladybugs had found it.
The ant tried blocking the way but fell off. Hopefully it's okay somewhere. The aphids, unfortunately, will not be.
Macro photography: saving you the cost of an "Oppenheimer" ticket, for the mere cost of all the money you have.