Danger Close

From the Call of Duty Wiki

Danger Close is a tier two perk in Call of Duty: Modern Warfare 2 that increases explosive damage. The pro version of this increases explosive damage from all killstreaks (not including UAV, Counter-UAV, Care Package, Emergency Airdrop, EMP and Tactical Nuke) by x1.4 and is unlocked by getting 100 kills with explosives (Claymores, Semtex, etc.) while using this perk. It replaces Sonic Boom from Call of Duty 4: Modern Warfare and Fireworks from Call of Duty: World at War.

This perk is unlocked at rank 33 and is the last tier two perk unlocked.

[edit] Trivia

• In military terms, "Danger-Close" refers to a situation in which friendly infantry is within 600 meters of a target/area marked for an artillery or air strike; specifically it is used to alert a supporting gunner (aircraft pilot dropping a bomb, helicopter gunner firing rockets, artillery crew firing shells, etc) of the friendly soldiers in the immediate vicinity of the designated target area, and that extra care must be taken to ensure the ordnance hits the target and nothing else.
• The name of this perk is likely related to various comments relating to Shepherd's tendency to order artillery dangerously close to units under his command.
• The easiest way to achieve the Pro version of this perk is to use a grenade launcher attachment, a Thumper or RPG as your secondary gun, Semtex, C4 or claymore as your equipment, and the perk Scavenger.
• Using Danger Close on the Javelin will make the blast radius even bigger in addition to increasing its damage, greatly increasing its deadly potential.
• Using this with Claymores and Scavenger makes a sniper's job defending their position easier.  Without this, claymores become alarms instead of effective killers.
• Using a Stealth Bomber with Danger Close Pro on the map Rust can easily destroy the entire map and will inevitably kill everyone. 
• To unlock the 'Danger-Close Pro' perk, some players play Hardcore game modes using the SCAR-H with Grenade Launcher (as it is a one-shot-kill weapon on Hardcore mode) Thumper/RPG as they both have 2 rounds and Semtex/C4 with Scavenger to resupply. Other players play modes like Demolition or Sabotage because everyone gathers around a central point/bomb, making it easy to kill multiple people with a single explosive.

Perks of Call of Duty: Modern Warfare 2
Tier 1 Perks	Marathon · Sleight of Hand · Scavenger · Bling · One Man Army
Tier 2 Perks	Stopping Power · Lightweight · Hardline · Cold-Blooded · Danger Close
Tier 3 Perks	Commando · Ninja · SitRep · Steady Aim · Scrambler · Last Stand
Kill Streak Perks	3: UAV Recon · 4: Care Package · 4: Counter-UAV · 5: Sentry Gun · 5: Predator Missile · 6: Precision Airstrike · 7: Harrier Strike · 7: Attack Helicopter · 8: Emergency Airdrop · 9: Pave Low · 9: Stealth Bomber · 11: AC-130 · 11: Chopper Gunner · 15: EMP · 25: Tactical Nuke
Death Streak Perks	Copycat · Painkiller · Martyrdom · Final Stand

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