Iran killed Americans in Iraq?

The "Iran armed militias in Iraq responsible for killing American troops" pretext for another war was already debunked

British Find No Evidence Of Arms Traffic From Iran http://www.washingtonpost.com/wp-dyn/content/article/2006/10/03/AR2006100301577.html

Top US General: No Evidence Iran Arming Iraqis http://www.nbcnews.com/id/17129144/ns/world_news-mideast_n_africa/t/us-general-no-evidence-iran-arming-iraqis/

Scant evidence found of Iran-Iraq Arms link http://articles.latimes.com/2007/jan/23/world/fg-iraniraq23/2

A shaky briefing on Iran http://busharchive.froomkin.com/BL2007021200678_pf.htm

And the New York Times had the same reporter responsible for pushing the "WMDs in Iraq" lie, pushing the "EFPs from Iran" lie, using the same discredited techniques of relying almost exclusively on anonymous government sources without a shred of effort at balance or objectivity, causing critics to compare him to a human tape recorder

Get the facts straight on Iran and EFPs http://archives.cjr.org/behind_the_news/get_the_facts_straight_on_iran.php

Revealed: NY Times' Michael Gordon is Voice-Activated Human Tape Recorder http://www.tinyrevolution.com/mt/archives/001315.html

New York Times Trumpets Pentagon Claims https://www.democracynow.org/2007/2/13/new_york_times_trumpets_pentagons_claims

Michael Gordon buys another bridge https://www.thenation.com/article/sold-mr-gordon-another-bridge/

http://www.counterpunch.org/2008/06/04/iran-and-efps/

EDIT: More links

And yes, the entire world laughed at US claims about Iranian arms being smuggled into Iraq, when for example the Pentagon had to backtrack its claims finally, after 2 attempts to "prove" it failed:

The briefing was the third in two weeks in which U.S. military officials put forth evidence that they said showed Iran's hand in Iraq's violence. In contrast with previous sessions, officers at Monday's display were careful not to accuse the Iranian government of involvement. U.S. officials have had to backtrack from previous assertions of direct involvement by Iran's top government officials. http://articles.latimes.com/2007/feb/27/world/fg-iraniraq27

AND NATO/Canadian military officials denied the claims that Iran was backing Taliban

"There were parts coming from Iran, there was parts also coming from other countries" said Brig.-Gen. Guy Laroche. "I cannot say from what I see on the ground that Iran is behind that." http://www.ctvnews.ca/top-general-says-no-evidence-iran-behind-ieds-1.269717

Even US Sec Def Gates said he didn't have proof implicating Irans' govt in arming the Taliban

"We do not have any information about whether the government of Iran is supporting this, is behind it, or whether it is smuggling, or exactly what is behind it." http://mobile.reuters.com/article/idUSFLE35878420070604

The Bush admin also made all sorts of excuses to not accept the Al-Qaeda operatives that Iran offered because the NeoCons didn't want to see Iran and US cooperating because they wanted to attack Iran next. More:

Iranian diplomats made clear at the time they were looking for broader cooperation with the United States, but the Bush administration was not interested ... http://www.cbsnews.com/news/iran-gave-us-help-on-al-qaeda-after-9-11/

Iran even offered to give BinLadin's son to the US but the Bush admin refused http://content.time.com/time/world/article/0,8599,1913323,00.html

The corrupt US media and NY Times of course instead promoted the official lies

http://www.tinyrevolution.com/mt/archives/001315.html

https://www.democracynow.org/2007/2/13/new_york_times_trumpets_pentagons_claims

https://www.thenation.com/article/sold-mr-gordon-another-bridge/

http://www.counterpunch.org/2008/06/04/iran-and-efps/