I think this is the more interesting aspect:

>"reasonably believed to contain evidence of a crime that has been, is being, or is about to be committed."

Is this sort of intelligence gathering of domestic signals handed over to other relevant authorities? I'm sure the DEA would love to have the NSA's assistance in tracking down drug dealers. I'm just not convinced it has much of anything to do with national security.

Also, does use of HTTPS constitute "communications that are enciphered?"