Yes, Iran has killed hundreds of US personel in Iraq and it is doing more in Afghanistan. It is getting away even when US is showing Iran their fingure prints. We helped Iran by removing Saddam, now we are helping Iran by destroying opium farms in Afghanistan. Iran uses 50% of what is produced across the boarder.
2 Yemeni Red Cross workers killed by gunmen (AP)
from the article: Obama: Evidence shows Iran is developing nukes