Geopolitical tensions undermine U.S. dollar * Oil resumes climb as geopolitical worries grow * Trichet comments underpin euro (Updates prices, adds quotes, changes dateline; previous LONDON, byline) By Gertrude Chavez-Dreyfuss NEW YORK, July 9 (Reuters) - The U.S. dollar weakened on Wednesday, as oil prices rebounded and geopolitical tensions resurfaced with news Iran test-fired missiles and unknown gunmen attacked the U.S. consulate in Turkey. Iran's state media reported that the country had test-fired nine long- and medium-range missiles, including one which it had previously said could reach Israel and U.S. bases in the region. "Geopolitical tensions are slightly weighing on the dollar, although, we haven't seen such big moves and we're still within trading ranges," said David Powell, a currency strategist at Bank of...
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