21.   But it was never collected, allegedly because of logistical difficulties.

22.   But the delivery presents significant logistical difficulties.

23.   But the tax was never collected, allegedly because of logistical difficulties.

24.   Continuing Serb obstruction and logistical difficulties then led to another postponement.

25.   Despite logistical difficulties and run-ins with Chinese security, participants called it a success.

26.   Final results are not expected to be known for five days after the vote because of poor communications and logistical difficulties.

27.   North Korea cited logistical difficulties.

28.   The logistical difficulties of moving such large numbers of people in a region with bad to non-existent roads are immense.

29.   They were rescheduled for November, but continuing Serb obstruction and logistical difficulties mean they will not now be held then, officials said.

30.   U.N. envoy Mohamed Sahnoun said logistical difficulties prevented agreement on final details of a cease-fire and other issues.