Bread-Bakers v109.n002.4

How does one make "air" bread??  I love making my dense breads but 
occasioally I would like to make a loaf of "air" bread.  By this I 
mean the type of fluffy bread that you can buy at the market.  How 
would you make a loaf like this??  It doesn't matter to me if it is 
by hand or machine.

Thanks,
Reggie