text:  So Ukrainians would certainly like to think the attack has created some momentum in their favor. And President Volodymyr Zelensky is not going to let attendees of the summit forget it. But Michael Kaufman at the Carnegie Endowment for International Peace is skeptical. My view of events of this type is that most of the substance tends to be agreed prior to the summit itself and that the summit is more of a convening event than not.