LAUSANNE, Switzerland (AP) — 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 a 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.