If you want the cod4 emblem (get 5 kills with a single airstrike) and you have been having trouble, why not not do it on a cage matcch? Impossible you say? Well its not!!!! Ive done this many times with my friends and we have all got it! Here is what you need:

1.Hardline
2.Presicion Airstrike UNLOCKED(not just one found in a lucky care package)
3.A partner that isnt a complete idiot (preferably a good friend that you trust.)
4.Tactical insertions (duhh)

Ok so heres what you do, first get your five killstreak and unlock your presicion airstrike. Have your friend put a tac down in an open area right in front of you so you know where they are when you call in the airstrike. Call in the airstrike ontop of your friend and the second it kills him have him respawn and it will kill him again without destroying his tac. Then get five kills again and do the same thing over and you should have a total of 4 kills with your presicion airstrike and 14 kills. Kill him five more times and call in the presicion airstrike on top of him to get the game winning kill. After the kill cam you should recieve a complettion notice about the carpe bomber and possibly another challenge about getting the game winning kill with your presicion airstrike. Hope this helps and if you have any trouble please feel free to pm me with your problem!!!