Tactical Nuke

The Tactical Nuke is an unlockable killstreak reward in Call of Duty: Modern Warfare 2. Requiring 25 consecutive kills, this killstreak is the hardest to acquire in Call of Duty: Modern Warfare 2. Once used, a ten second countdown will display on all player's screens, and a siren will sound. Once the countdown expires, the entire battlefield will be engulfed in white light. Time will appear to slow, all vehicles and sentry guns will explode, and finally, all players including the user die on the spot. A Tactical Nuke detonation results in an automatic win for the user and their team, no matter what the current score.

Trivia
Players killed using the nuke whilst on a 25 kill streak also add to your final count
 * The nuke only kills players and doesn't affect the environment at all, aside from leaving a vast quantity of red nuclear fallout.
 * The tactical nuke's launch can't be activated while you are affected by an active EMP. However, an enemy using an EMP after the launch will not interrupt the countdown, and it will still detonate.
 * The nuke will appear to be in a different place to every player, appearing to strike outside the level.
 * After you have used two nukes, you will unlock the Multiplayer title Global Thermonuclear War. After deploying five nukes, you will unlock the title End of Line. After you have used ten, you will get an animated emblem of the Tactical Nuke.
 * The Multiplayer title Toxic can be unlocked if you are killed by a hostile Tactical Nuke.
 * The tactical nuke, when activated, stops the timer of the game. In addition, points may not be scored (e.g. capturing the flag), but experience will still register.
 * It is generally beliveved that the easiest way to obtain a Nuke is have the kill streaks Harrier Strike, Chopper Gunner and then of course Nuke.