It's actually done through some sophisticated electronics.
Once the pilot gets his target and sets it, the computer takes over and keeps the sights (or laser designator) on target until "delivery". He doesn't even have to look at it again.
(But I'd be willing to bet most do, just to enjoy the satisfaction of a job well done.)
GEEEZ what the hell did they hit those guys with anyway ?
Wonder how far away the aircraft was when they shot this..At that speed they had to be at some distance for the guys on the ground not to hear the jet coming .
Nice work for sure....