Tactical Nuke

The Tactical Nuke is an unlockable killstreak in Call of Duty: Modern Warfare 2. Requiring 25 consecutive kills, or 24 with the hardline perk. This killstreak is the hardest to acquire in Call of Duty: Modern Warfare 2 due to the number of kills involved. Once used, a ten second countdown will be displayed for all players. Once the countdown expires, the entire battlefield will be engulfed in bright light, then the gameplay will go into slow-motion followed by every player being killed (including the user), and the match ending. A Tactical Nuke detonation results in an automatic win for the user and his/her team, no matter what the current score. The Toxic title can be earned by being killed by it if you are still alive when it goes off.

Trivia

 * The nuke only kills players and doesn't affect the environment at all.
 * The nuke can not be prevented by using the EMP kill streak reward. This video is proof
 * The easiest way to get a Nuke, is to use the kill streaks Harrier, Chopper Gunner and of course the Nuke. Once you get your harrier, hide well and call it in on your enemies. Once it gets 4 kills, call in your Chopper gunner and go on a rampage. With some luck, you'll get 14 kills and end the game.
 * When the scoreboards are shown, the map appears red and windy, like Aftermath.