Level Up so manny times and it will give you one. It will tell you how many level ups till you unlock one on the upper right hand corner.
you can unlock it with you're first killstreak award unlock
by killing someone with a ten or more killstreak that's for the emblem
NUKE!!!
The best killstreak is the Tactical Nuke but use killstreaks that you can get frequently.
Get 47 killstreak on call of duty modern warfare three
It is called the Tactical Nuke and you have to unlock that in the callsigns and killstreaks reward menu in online game play. It is a 25 killstreak reward!
how do you unlock Municion viva on call of duty modern warfare mobilized
The emergency airdrop killstreak is unlocked at 8 kills.
Kill 10 enemies with a single killstreak reward
You unlock cold blooded pro by destroying 40 killstreak rewards with cold blooded on, which are things such as; helicopters, harriers, turrents, and maybe care packages, not sure about the care packages.
You have to complete a certain challenge for this specific kill streak, you pretty much just have to call it in a certain number of times. To check how many times u need to get the killstreak go to Barracks>Challenges>Killstreaks and just complete them to get the emblem. Hope this helped!
Kill an enemy just before they earn a 10 or higher killstreak