I will be researching more into this unusual story for my forthcoming book.
Full report here
Whilst treating the report with a high degree of scepticism as there appear to be no confirming reports from other sources, the possibilities as a speculative writer are exciting to say the least!
ancestortrilogy 
Some interesting stuff in there but seems a bit “tinfoil hat” – the involvement of the US military with some hi tec digging equipment made me wonder – and the “energetic shield” around Baghdad seems unlikely – except as a metaphor maybe.
Still, interesting. If you find any corroborating evidence, let me know. 🙂