There was brief media splash last month after Germany's ZDF TV reported that the US is planning to replace 20 nuclear bombs deployed at Büchel airbase. According to the reports, the current B61 bombs are to be replaced this year with B61-12s, a newer version that is said more accurate and less destructive (potentially making their use more "thinkable"). Alarmingly, reports indicated that the new variants can also be fired as missiles, while B61s had to be dropped from aircraft. Moscow of course immediately responded by threatening "countermeasures"—including deployment of Iskander ballistic missiles to Russia's Baltic Sea enclave of Kaliningrad. (The Telegraph, Reuters, Sept. 23; Washington's Blog, Sept. 23)

US Air Force C-17 cargo planes air-dropped arms and other supplies to Syrian rebels on Oct. 13—as Russia continued to carry out air-strikes on Syrian rebels. Media reports are vague on whether the US is dropping aid to the same factions that Russia is bombing. But the Kurdish-led People's Protection Units (YPG) have announced a new alliance with militias affiliated with the Free Syrian Army (FSA) to fight ISIS in the country's northeast. The Pentagon has now officially dropped its failed $500 million plan to train a Syrian rebel proxy force, and will instead use those funds for air-drops to already existing rebel forces.

Moscow's military intervention in Syria took a sobering turn this weekend as Turkey scrambled fighter jets, accusing Russian warplanes of violating its air space. Turkey has summoned the Russian ambassador over the matter, and NATO condemned the incursions as an "extreme danger." (Al Jazeera, CNN, Daily Sabah) Apart from the obvious dangers to world peace (such as it is), this development holds grim implications for the Syrian Kurds—the most effective military force on the ground against ISIS. Turkey, afraid that a Kurdish autonomous zone on its southern border will inspire its own Kurdish population to rise up, has been cynically labelling the anti-ISIS Syrian Kurds as "terrorists," and seeking to establish a military "buffer zone" in Kurdish territory in norther Syria. Since Turkey and Russia are bitter regional rivals, Moscow's intervention risks drawing the Kurds into the geopolitical game.