Reporter: Are China and Russia giving targeting information to Iran? These last few attacks have been very devastating to U.S. troops.

INTELLIGENCE SUMMARY

Reporter: Are China and Russia giving targeting information to Iran? These last few attacks have been very devastating to U.S. troops. Rubio: Anytime you're in a combat zone like that, there's danger associated with it. I mean, at the end, this actually proves the point that this is what Iran has been investing its money in for the last 20 years. Nothing that China has done, has in any way changed the trajectory of what you're seeing in terms of the conflicts we're having with Iran. And in fa