israel, of course; 

If X user VillgeCrazyLady is to be believed then our agency of domestic spies in one of their routine metadata sweeps (yes, they're still doing that) detected 12 registered Israeli cellphones. For those that aren't familiar with how cellular registration works it is tied to your carrier service via SIM provisioning meaning these 12 cellphones carry SIMs for an Israel based carrier service. That on the surface doesn't mean much, as pointed out in the article there could be possible alternative explanations but if there were easily explained away then why would the NSA deem it prudent to inform the FBI and the White House if they didn't believe it to be serious?............more...........