Here is a list of killstreaks for Call of Duty that I came up with:
Mortar Crew: (9 kills in a row)
It can be destroyed by shooting the mortar, or using explosives.
Aerial Gunner:(7 kills in a row)
You will be able to man a mount a Mk 19 grenade launcher on a helicopter and fire at troops on the ground, or shoot down other helicopters.
The helicopter can be shot down by rockets, grenades, shooting at either the helicopter blades, or shooting the gunner.
Disabled:(6 kills in a row)
Red dot sights, holographic sights, ACOGs',and thermal sights cannot be used and are disabled for 60 seconds.
Flamethrower:(10 kills in a row)
You will be given a flamethrower and you can use it for 90 seconds.
Note: If you kill a flamethrower, you cannot pick it up.
Robot Gunner:(3 kil
You will take control of a robot with a AA-12 and you can fire it at any enemies.
Can be destroyed by any weapon.
Note: You cannot be killed while controlling the robot.
Mines:(3 kills in a row)
You will get ten mines and you can set them where ever you want.
You can destroy the mines.