Is it ethical to travel to Russia?

Now is not the time to visit Eastern Europe. But how long should you stay away?

The reaction to Russia's unprovoked attack on Ukraine last week was swift and virtually unanimous. Tour operators canceled or rerouted their Russian itineraries. Airlines ended their code-sharing agreements with Aeroflot, the Russian carrier. Cruise lines quietly turned their ports of call in St. Petersburg into "at sea" days. Even Visa and MasterCard h…