Indira A.R. Lakshmanan writes: Covering the path to that deal was the main focus of my beat at Bloomberg News for the past seven years. I traveled more than 140,000 miles and spent months at hotels in Europe, New York, the Middle East and Central Asia, reporting on talks by Kerry and U.S. nuclear negotiators. Now that the deal is done, 12 current and former Obama administration officials intimately involved in the negotiations spoke to me last week, revealing new details for the first time. This story of the behind-the-scenes calculations along a seven-year road to a deal is based upon those accounts, as well as on hundreds of hours of reporting on the talks I did as they unfolded in recent years in capitals across three continents. [Continue reading…]