Secretary of State Warren Christopher was unable to push the sides in the Bosnian conflict to an agreement at a crucial stage in the two-week-old negotiations. Christopher had traveled to Dayton Tuesday morning hoping to force resolution on crucial questions of territorial control in the former Yugolavia, particularly concerning Sarajevo. "Our negotiating team is certainly willing to work with these parties for the next few days or perhaps into next week," said State Department spokesman Nicholas Burns. But he ruled out a "partial" or "barebones" accord as unacceptable and said that "they can't go home until they reach a full agreement" or simply call it quits. "It is truly unpredictable," says TIME's James Graff. "But American diplomats are hoping to have an agreement by the weekend. I've heard that President Clinton wouldn't mind coming by on his way to Tokyo this Friday."