* Escalation of Ukraine tensions pushes up yen, Swiss franc * Euro hits 21-month low against Swiss franc (Adds dollar gains, quotes, U.S. NEW YORK, Aug 28 (Reuters) - The dollar got a lift from better-than-expected U.S. "The basic story is still in place of a solid rebound (in the economy) in the second quarter after a depressed first quarter," said Doug Handler, chief U.S.
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