Artistically:
It is really really mind blowing. I'm a big fan of these kinds of images, just as rob, i have a poster of Jim Carrey's 'affiche' for the truman show that was done in the same way.
Bravo Patrick, as it's really well done (the child appears really well!!)... However, i have on artistical critic: image repetition. Maybe it's because you did it alone and didn't have a lot of time, but it would have been so much better if all of the images were different. I mean, there's a few images (like bachir's and what i think to be hariri's explosion) that stick out too much which removes a bit of the beauty of the whole thing. Specially that sometimes, these images are in series sometimes (like top left with the explosion pic). You should take time to fix that!
Politically/Socially:
The message will pass really better if you just showed WHAT the "leaders" did, if you just showed the Damage, rather then showing the actual leaders themselves.
Because believe me or not, a lot of people, including me, do not want to raise their children i war and damage but nevertheless want to raise their children in a Lebanon with all, for all, and believe in a Lebanon that some "leaders" talk about (independantly of the fact that these "leaders" may or may have not participated in the war/damages/corruption... etc...).
Anyway, to sum up: remove all pictures of leaders, they just send out a message that's not supposed to be sent out... Show us the damage, only. Because to tell you the truth, it's quite disturbing to see a man who was only known in wartime (did not have the chance to live till peace) in a art work for peace...