EMP

The EMP (Electromagnetic Pulse) is an unlockable kill streak in Call of Duty: Modern Warfare 2. Requiring 15 consecutive kills, this kill streak temporarily disables all electronic-based weapon attachments, kill streaks, and even the HUD of the user's enemies. If any hostile kill streak is active when the EMP is used, those kill streaks will be destroyed.

The EMP is the only way to counter a Tactical Nuke.

Affected weapon attachments

 * Red Dot Sight - "Red dot" disappears
 * Holographic Sight - Targeting reticule disappears
 * ACOG Scope - Red cross hairs disappear, but the black cross hairs remain
 * Thermal Scope - Thermal vision is disabled, but the in-sight cross hairs remain
 * Heartbeat Sensor - Screen will be filled with static

Trivia

 * The EMP seems to be caused be detonating a nuclear warhead in the upper atmosphere, similar to the one in the level Second Sun.
 * An actual EMP would effectively brick any computer chip caught in the blast radius. The fact that this kill streak's effects are temporary, or even that it only affects the user's enemies, is impossible. The EMP which occurred in the level Second Sun is much more realistic.
 * It is possible to obtain an EMP form a care package.