It is also dangerous due to the accurate AAA operators who tend to shall we say... discourage straight and level flying in the target zone!
Probably the first Air to Ground systems to master should be the HARM (High Speed Anti Radiation Missile) which you'll use to quieten down enemy AAA and SAM sites.
AAA = Anti Aircraft Artillery
SAM = Surface to Air Missiles
The F-117 A Stealth Fighter (actually a bomber!) will help you out as well as the enormous B-52. It's quite awesome to formate on one of those monsters.
B O O O M! That's what we like to see!
M1A1 and Humvee. This is a friendly convoy! You'll need to "cheat" using the '5' key to pick good form bad guys, as they're practically invisible from the air...just like in real life I guess!