Twenty years ago, the Soviet Union’s military retreated from Afghanistan in disarray. Their bloody nine-year conflict has often been called ?Russia’s Vietnam.? Now some Russians see America and its NATO allies heading for a similar destiny. To discuss this alarming possibility is Sergei Khrushchev, the son of the former Soviet leader Nikita Khrushchev. (Sergei’s father died in 1971.) Sergei, a fellow in international affairs at Brown University, joins a conversation with the BBC’s Russia reporter Olexiy Solohubenko and James Joyner of the Atlantic Council.