User blog comment:Bovell/Color blind assist option for Modern Warfare 3. Killstreak system reworked./@comment-99.41.18.28-20110708174008/@comment-252163-20110708211846

Well it's hard to say "earned". I would get 7 kills for harrier, get 4 kills with the harrier or on my own to reach chopper gunner, use chopper gunner to get anywhere from 5 to 15 kills, and then make up the rest to get a nuke. It takes at least some skill to be able to survive for that long especially when you're vulnerable while you're using a killstreak.