"Cover the battlefield with white smoke incendiary canisters that will weaken the enemy and burn any that wander too close."
Once the target is designated, a Su-25 flies in a straight line and drops several white phosphorus canisters on its path, obscuring the map with a white fog that can hinder vision for both teams. The canisters will burn for a period of time upon landing which can burn those who came too close and kill players with direct hits when being dropped. It is basically a lesser version of Napalm Strike in Black Ops.
White Phosphorus killstreak infocard.
White Phosphorus being utilized in the singleplayer level "Fog of War".
The inclusion of White Phosphorus in Call of Duty: Modern Warfare has been criticized and sparking controversies prior to the game's release, noting that its usage is restricted by international law.