Looking at these images it occurs to me that the civil ambulance helicopters like those seen in the US, UK and Germany don't carry red crosses.
Odd. They usually have bright paint schemes and plenty of identification so everyone knows what they are, but they (and most ambulances here in the US...and I don't recall seeing any in the UK, though I certainly could have missed one) don't carry the international symbol of relief/medical transport.
Also, anyone else find it a bit ironic that communist (and presumably atheist) countries also use the red cross?
There are two sides to every story. The truth is usually somewhere between the two.