Cash leaves no paper trail and any Iranian covert operative worth his salt would want to see Shia causalties. Shia's can keep the pot stirred longer and more effectively than the Sunni's and the stirred pot with all its gore is what is turning the Dems and some Republican's against funding the war. The more Shia's killed, the more revenge and the sooner Congress pulls the plug and Ill bet my dog and granddaughters that Iran has been behind every Shia mosque hit. I think once China can be convinced they will not lose their energy resources via an attack on Iran's nuclear sites, it will happen. That will open the door for other punitive strikes in the name of operational security to back them out of Iraq completely. A nuclear Iran with free reign in the southern Iraqi corridor to Jordan and Israel , visa-via an absent US presence, is the world's worst nightmare scenario. Why would dreaming big end in Iran with the acquisition of nuclear arms? The key to Israel lies through Jordan what with hizbullah on its northern flank and there is nothing that unifies disparraging muslims more than an attack on Jews. Nasrallah of hizbullah has already been telling everyone who will listen that the US cannot and will not stay in Iraq. He doesn't care about Iraq, he only wants his mentor Iran to extend its reach and influence.