The proposed UPS takeover of TNT Express could be on the rocks, according to reports this week from Reuters and the Financial Times . Delays in obtaining regulatory approval of the 5.2 billion euro ($6.5 billion) deal last spring between two of the world's Big 4 integrated express carriers were the first sign of potential problems. Two weeks ago, Joaquín Almunia, European Commission vice president responsible for competition policy, expressed conc...