From wigs to dead drops, the espionage tussles between the United States and Russia are increasingly playing by the old Cold War rules -- including the public shaming of the unlucky spooks who get caught.

In his scholarship, Waltz asked the tough questions about the difficult and important issues. He was motivated by both theoretical and policy questions, the latter often setting the agenda for the former. He was intellectually courageous, usually staking out iconoclastic positions -- some of which were initially derided, many of which ended up becoming mainstream thinking. No matter what one’s theoretical persuasion, he was an intellectual force that had to be reckoned with.

One out of every four refugees in the world is from Afghanistan. Many make their escape via the Tora Larah, the Black Way, a long and dangerous underground railroad that winds through Afghanistan, Pakistan, Iran, Turkey, and Greece. Those that travel this path might escape their home country, but they often end up bringing its violence along with them. Here is one migrant's story.