11.   Most climbers retreat within a few minutes of scaling the peak, with its high winds, freezing temperatures, rapid weather changes and lack of oxygen.

12.   Several hundred climbers scale the peak each day in summer, authorities say.

13.   The four scaled the peak last Thursday.

14.   The riders scaled peaks swathed in thick fog, unable to see anything at altitude except pine trees at the side of the road.

15.   The American managed to scale the peak but became lost on his descent.