Well, all I can say is it's a good job the helicopter was used for a relatively harmless event in a jailbreak, as opposed to being hijacked by terrorists and flown into a large crowd of people, given the location, a beach on a sunny Saturday afternoon for example!!
I wonder if any action was taken to intercept!

OK, so maybe no-one knew about the hijack from leaving the airport to the prison, but after that?
Apart from the heli being hijacked from an airport, that flight must have taken at least 30 minutes, and on the way passed Cannes with all it's western extravagances, twice, and would have been heading straight for Marseille.
Monaco is only 10 minutes flying time away and Nice a tad closer.
Still, I suppose this sort of thing, jailbreaks by heli, is harmless really and nothing too bad will happen in France anyway on the terrorist front!.......will it!