11.   Troops from as far south as Namibia and as far north as Chad are fighting inside the Congo basin.

12.   But the rescuers persisted, following the man south as the river carried him away, trying to fling the rope to him.

13.   Light snow also fell from the northern Plains across the Mississippi and Tennessee valleys and as far south as Arkansas.

14.   The vast area goes as far north as southern Scotland, and as far south as the tip of South America.

15.   It was not immediately clear what caused the sporadic blackouts, which affected communities as far north as Oregon and as far south as San Diego.