They rely on the camel for transportation , as much as it needs them to periodically dig for water .
The nomadic Tuareg people cross the Sahara from one side to the other -- but ca n't do so unaided .
people rely on the camel for transportation , as much as it needs them to periodically dig for water .
The nomadic Tuareg people cross the Sahara from one side to the other -- but ca n't do so unaided .