A little question?

Before the question itself, welcome to Mike Walker, our newest follower. I just followed a few links among your favourite blogs Mike, and I like a lot what you listen to!!! ;)

Now, time to write down some question marks.

I was answering to a few comments posted on this blog when I saw again this picture I've recently shown:



So here are all four GT40s to have won Le Mans between 1966 and 1969. So my question to you Le Mans buffs is the following:

Unlike the scale models, why a picture featuring the real cars would be impossible to take?

I'll let you think about this for awhile, then I'll come back with the answer and the name of the first among you to have provided to correct answer.

Have a good week-end! :)