[finnigan2]

"Why am I not believing this?"

- Well, I for one am not believing this because a "pilotless drone" takes a hell of a lot more technology to produce than Iran possesses. For starters, drones are guided from the ground by technicians who rely on military satellite GPS technology to steer the craft. For starters, Iran doesn't have any such satellites so once it was beyond visual range, the drone would wander off course.
Secondly, to get close to the USS Ronald Reagan a drone would have to employ stealth technology in it's design. Again, Iran doesn't have the slightest idea where to even start to produce such a craft.
If there's even a grain of truth to this story, Iran would have to have built a radio controlled drone and programmed it to fly a predetermined course, out and back. Any similarity between this flight path and the location of the USS Ronald Reagan would be purely coincidental.

[null and void]

For starters, Iran doesn't have any such satellites

OTOH they do have GPS receivers. I'm given to understand that the Tehran Radio Sheik® has them in stock.

Again, Iran doesn't have the slightest idea where to even start to produce such a craft.

There's stealth, and then there's stealth. A slow 6 ft wing span drone doesn't need the same level of stealth technology as a B1-B to have a small radar signal.

For starters, drones are guided from the ground

Ours are. Nothing says theirs need to be. A modified commercial aircraft has a wide visual range. (And for extra bonus points, given what the Vincences did, we are very reluctant to shoot at anything that looks like a commercial aircraft in that area).

[DK Zimmerman]

Hummm, p'raps you're unaware that the Israelis developed the first practical "UAVs" during the 73 war? (When exactly did GPS go up?) True, they were little better that a closed circuit camera on a model airplane, but they were responsive to the local commander and showed him what was over the next ridge with minimal risk.

The US military proceeded to spend about a billion dollars and fifteen years or so proving what the Israelis had accomplished was impossible (Aquila et al).

Without more details or a US response, frankly, it is impossible to tell how much of this report is fiction and how much is fact.