Now, let me say this: Recognizing that negotiations need to begin with the issues of territory and security does not mean that it will be easy to come back to the table. In particular, the recent announcement of an agreement between Fatah and Hamas raises profound and legitimate questions for Israel: How can one negotiate with a party that has shown itself unwilling to recognize your right to exist? And in the weeks and months to come, Palestinian leaders will have to provide a credible answer to that question. Meanwhile, the United States, our Quartet partners, and the Arab states will need to continue every effort to get beyond the current impasse.