NEW YORK (TheStreet) -- The euphoria created by December's announcement of a new era of Cuba-U.S. relations, and what it means for trade and business, has been diminishing gradually as optimism fades in the face of reality. The slow pace of diplomacy and politics, relatively high risk and, believe it or not, terrorism are all hurdles that need to be overcome before normal trade with the nearby island nation of 11 million can be restored.