Shooter (2007)

That's because long shots generally go places you wouldn't wanna have to go afterwards to confirm them. Confirmation's a desk pogue's problem. You know what it takes to make a shot at that range? Everything comes into play that far. Humidity, elevation, temperature, wind, spindrift. There's a 6 to 10 second flight time so you have to shoot at where the target's going to be. Even the Coriolis effect, the spin of the Earth, comes into play. President'll be wearing body armor. That means a headshot, at over a mile. You believe there's a shooter involved capable of making this shot?

Well, then you got a real problem. You need to find the shooter.

Out of the three cities, there's only one with a reasonably high chance of success. There was no room in Baltimore. Street isn't wide enough to correct for the windage, buildings are in the way. D.C.'s a pure suicide mission. I mean, unless you're sure your shooter's interested in 70 virgins waiting for him in the afterlife, I'd rule that out. Shot's got to be taken from Philly. From beyond 1800 yards, though. It's one of six possible locations, approximately five stories above the President's location. Flight time of the bullet that distance is five to six seconds. They'll have to wait till he takes the podium, several lines into his speech. That way he'd be completely static, obviously at his most exposed. Shot requires a large-caliber weapon. Expect the bullet to be handmade, bronzed alloy turned on a lathe. Slightly lower ballistics coefficient, touch more slippery. Least that's what I'd do.