Another nail another flat tire

The culprit this time:

Is it a nail? Or a pin? Either way, it's more than half an inch and was embedded in my tire tread, puncturing the tire.
 

The tip just grazed the tube and so the hole was hard to find. (I used the bowl of water method.)

Finding the nail was not hard- the size of it was quite shocking.

However, thanks to my Marathon plus tires, the flat was a slow leak that I discovered this morning and not an explosive "ffffffftttt" while out in the middle of some sand dunes...

I'm impressed at how the tire held it in place so that it didn't push all the way through. I guess that's why I bought these tires!