While interesting in itself, it's certainly not the first. the lockheed martin RQ-170 has been in service in afghanistan since 2007, and is thought to have even played part in the operation to kill Bin Laden.
These designs are really common on headstones in new england. they started as stylized skulls(and other depictions of Death), angels, etc. later you would find symbols of churches and other things. Willow trees are common, too.
I miss my smoker :(