http://en.wikipedia.org/wiki/Second_Battle_of_Fallujah#Use_of_white_phosphorus
On 10 November 2004, the Washington Post reported that some U.S. artillery guns fired white phosphorus rounds that created a screen of fire.[46] Insurgents reported being attacked with a substance that melted their skin, a reaction consistent with white phosphorus burns.[46] On 26 November 2004, Dahr Jamail also reported that white phosphorus had been used in the battle.[47][dead link]
On 9 November 2005 the Italian state-run broadcaster Radiotelevisione Italiana S.p.A. aired a documentary titled "Fallujah, The Hidden Massacre", alleging that the United States' used white phosphorus as a weapon in Fallujah causing insurgents and civilians to be killed or injured by chemical burns. The filmmakers further claimed that the United States used incendiary MK-77 bombs in violation of Protocol III of the 1980 Convention on Certain Conventional Weapons. According to the Organization for the Prohibition of Chemical Weapons, quoted in the documentary, white phosphorus is permitted for use as an illumination device and as a weapon with regard to heat energy, but not permitted as an offensive weapon with regard to its toxic chemical properties.[48][49]
On 16 November 2005, BBC News reported that an article published in the March–April 2005 issue of Field Artillery, a U.S. Army magazine, noted that white phosphorus had been used during the battle. According to the article written by a captain, a first lieutenant, and a sergeant, "WP [White Phosphorous] proved to be an effective and versatile munition. We used it for screening missions at two breeches and, later in the fight, as a potent psychological weapon against the insurgents in trench lines and spider holes where we could not get effects on them with HE [High Explosives]. We fired "shake and bake" missions at the insurgents, using WP to flush them out and HE to take them out."[48] BBC News noted that the article had been discovered by bloggers after the US ambassador in London, Robert Holmes Tuttle, stated that US forces do not use napalm or white phosphorus as weapons.[48] The United States continues to maintain that white phosphorus was not used against civilians, but has
since confirmed its use as an offensive heat weapon against enemy combatants.[