Steering a Baloon

If baloons are subject to the air current they are in, how do baloon pilots fly to an intended destination? For example, during baloon tours; they go up then bring their passengers back to the same point of origin.
 
If baloons are subject to the air current they are in, how do baloon pilots fly to an intended destination? For example, during baloon tours; they go up then bring their passengers back to the same point of origin.
Here's the FAA Balloon Flying Handbook:

http://www.faa.gov/library/manuals/aircraft/media/FAA-H-8083-11.pdf

Lots of good books on the subject; one book in my library that I think worth recommending is "Ballooning" by Anthony Smith and Mark Wagner.
 
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