The latest email leaks from the Hotmail account of the United Arab Emirates' ambassador to Washington, Yousef al-Otaiba, could threaten Emirati diplomacy and strain regional relations, analysts say. Leaked emails point to strong relationship between the UAE and think tanks closely allied to Israel. Also contained in Saturday's leaks were emails detailing communications between the UAE and the US that aimed to prevent a meeting by the Islamic resistance movement, Hamas, in the Qatari capital, Doha.

Contemplating Russian nuclear threats during the Cold War, the strategist Herman Kahn calibrated a macabre ladder of escalation, with 44 rungs ranging from “Ostensible Crisis” to “Spasm or Insensate War.” In the era of cyberwarfare that’s now dawning, the rules of the game haven’t yet been established with such coldblooded precision. That’s why this period of Russian-American relations is so tricky. The strategic framework that could provide stability hasn’t been set.

The Pentagon dismissed an attack on its social media sites Monday as “cybervandalism,” hitting back at an aggressive effort by supporters of the Islamic State to wrest control of Twitter and YouTube accounts belonging to U.S. Central Command.

North Korea’s state-run news agency claims that suggestions Pyongyang was behind the cyber attack on Sony Pictures are “wild rumor.” But according to the New York Times and other media sources, U.S. intelligence officials have concluded otherwise. The attack, those officials say, “was both state-sponsored and far more destructive than any seen before on American soil.”