@Drnaline,
"It is inconceivable that it is anyone other than the Iranian government that's doing it," said former White House counterterrorism official Richard Clarke, an ABC News consultant.
Secretary of Defense Robert Gates stopped short earlier this week of blaming Iran, saying the U.S. did not have evidence "of the involvement of the Iranian government in support of the Taliban."
But an analysis by a senior coalition official, obtained by the Blotter on ABCNews.com, concludes there is clear evidence of Iran's involvement.
So, there really isn't any "document" and no arms from Iran have actually been seen or actually caught changing hands with Iraq...definitive proof most definitely.