Iran says that it has just shot down an American spy drone. Last July Iran claims that it shot down a US spy drone. Last January the Iranians said that they shot down two US spy drones.

News report per Aljazeera: “Iran military ‘downs US drone'”

Also, Iran is threatening to attack the US outside of Iran’s borders as stated in this Reuters news report: “Iran threatens wider response to U.S. drone – state tv”

Here’s a Russia Today news video that tells about the shooting down of the spy drone:

Iran missile development: