The Rational Security gang starts the year with our 50th episode. Kim Jong-un says North Korea tested a hydrogen bomb. The Russians may have caused a blackout in Ukraine with a cyber attack. And President Obama plans to do a lot of foreign travel in his final year in office. Plus, did the North Korean leader show up at my climbing gym in Rockville? Are embassies skimping on holiday gifts? And a new book about . . . lawfare.