Weeell, you may use this piece of code
myAV8 fire "BombLauncher";
but all this does is force the AV8 to release a bomb, its not that great for any kind of targeting!!!
You could play about with the flightpath of the planes (remember to set their behaviour to careless so they dont respont to threats) but that could take time to get the bombs on target.
There were a load of good airstrike scripts for OFP that OFPEC had hosted back in the day, I found
this one in the OFPEC Editors Depot. Basically it directs a plane (you have to give it some init code and the plane has to exist already in the mission editor) to fly over a target and then simulates a bomb drop with some shells. It's more mission orientated, i.e. it adds an entry to the action menu of a selected unit and I think would probably use a mapclick command to direct the strike but you could fairly easily modify it for a cutscene.
If you need help modifying the script for ARMA, understanding a bit more about how to implement it or are just stumped post back and i'll try and help!!! I'm sure Mr.Peanut will help as well
and correct my mistakes.