Now that Russian President Vladimir Putin has annexed Crimea, the Obama administration continues to “talk tough” about how we’re going to “punish Putin” for his aggression.Even before Russian troops entered Crimea, Secretary of State John Kerry said annexation would violate international law. He warned Putin that the Obama administration was poised to “punish Russia with visa bans and banking and business sanctions.”Kerry also hinted darkly, “I don’t want to go into all the details, except to say this: It can get ugly fast [if] the wrong choices are made.” But talk is cheap – and actions can be costly.