HITMAN™ 2 Master Difficulty - Sniper Assassin, Paris "The Showstopper" (Silent Assassin Suit Only)
Shoot the fire alarm here to make all the civilians enter panic mode.
Now you can bypass them and access the first floor.
Distract the stage crew and knock him out, get the detonator, you'll need it later.
Now wait for Viktor and his bodyguard.
Lure the bodyguard inside, knock him out. We don't want the bodyguard to be near Viktor when we snipe him.
Take out the camera here.
Now trigger the firework show.
Wait for everyone to look up at the firework.
Now snipe both target and make your escape.