Nuclear negotiations between the United States and Iran entered a critical phase on Thursday with U.S. Secretary of State John Kerry meeting his Iranian counterpart less than a week away from an end-of-month deadline to secure the outline of a deal. With the clock ticking, Kerry and Iranian Foreign Minister Mohammad Javad Zarif and their teams huddled Thursday in the Swiss resort town of Lausanne on Lake Geneva trying to overcome still significant gaps after nearly two years of negotiations between Iran and the five permanent members of the U.N. Security Council and Germany. The top diplomats from Britain, China, France, Germany and Russia are expected to join the talks if the U.S. and Iran are close to an agreement. U.S. officials say the March 31 deadline is achievable but remains uncertain. En route to […]