New Delhi, Aug. 29 -- The meeting was supposed to demonstrate that Europe had not been left behind.

European and regional powers still have a stake in how the Iran nuclear file resolves, and the United States cannot settle it alone.

The meeting has been postponed. No new date has been set.

The stated reason, a scheduling conflict involving one of the participants, disclosed nothing about which of the seven governments pulled back, or whether the conflict was a genuine calendar problem or something more substantive. German officials who confirmed the postponement to DPA did not identify the participant responsible. Whoever caused the delay, the result is that the coalition Germany and Turkey assembled to project diplomatic coherence has...