Here are two articles posted by the BBC about the Iranian Military. The first article entitled Iran Says it Could Attack First, goes into some detail about how if Iran does feel other countries are threatening them or if Iran feels its national interests are endangered they are able and willing to attack.
http://www.bbc.co.uk/news/world-middle-east-17116588
The second article entitled Iran to hold military drills ‘to protect nuclear sites’ goes into detail about how Iran is willing to protect and defend their right to hold nuclear weapons.
