The presence of Russian troops in Ukraine 's Crimea has ratcheted up tensions . Comment: A military response is n't considered to be a realistic possibility . Russian soldiers wearing no military insignia have taken up positions around the region . The crisis is roiling global markets , pushing up the price of oil and hurting the ruble .
The presence of Russian troops in Ukraine 's Crimea has ratcheted up tensions . Comment: A military response is n't considered to be a realistic possibility . The crisis is roiling global markets , pushing up the price of oil and hurting the ruble .