WASHINGTON (Reuters) -The U.S. current account deficit contracted by the most on record in the second quarter as a flood of imports subsided. The Commerce Department's Bureau of Economic Analysis said on Tuesday the current account deficit, which measures the flow of goods, services and investments into and out of the country, decreased by a record $188.5 billion, or 42.9%, to $251.3 billion, reversing the prior month's jump. Data for the first quarter was revised to show the gap at $439.8 billion, sti ...