WSJ: “Spy vs. Spy: Inside the Fraying U.S.-Israel Ties”

“Distrust set allies to snoop on each other after split over Iran nuclear deal; each kept secrets.” An interesting account of US v. Israel intelligence and counter-intelligence around the Iranian nuclear negotiation. Israel was tracking comings and going of US negotiators in Oman, based on the tail numbers on the planes. Wall Street Journal – subscription required. He is followup report in Times of Israel.