21.   The trans-Atlantic move presents an unprecedented security challenge.

22.   They reportedly planned to walk to their appointments in Oslo, creating a huge security challenge.

23.   ASEAN deputy secretary general Ahmad Mokhtar Selat, told reporters the neighbours now had a map to combat terrorism and tackle other security challenges.

24.   Diouf, who will chair a food summit in Rome next month, said the meeting would help provide a more global vision of the food security challenge.

25.   Karzai faces a security challenge after fighting in the eastern city of Gardez last week led to the defeat of his handpicked governor.