I think a few months ago I read that the Americans were sending F-16's and the like briefly into Iranian airspace to test their defenses. Now pilotless planes. Perhaps they'll use the drones as bait - to see where the anti-aircraft guns and missle launchers are?
I wouldn't be surprised if they are gathering intelligence that can show the Iranians up as liars once and for all at the UN Security Council. We'll have solid proof this time. Though it's always best to have assets on the ground - which is also the hardest to do.
Making progress every day now, it seems...
Satellite photos and drone footage won't do this time... remember Powell's speech at the UN in 2002?