A Multicenter, Randomized, Double-Blind, Parallel Group, 52-Week Comparison of Asthma Control and Measures of Airway Inflammation in Subjects of African Descent Receiving Fluticasone Propionate/Salmeterol 100/50mcg DISKUS® BID or Fluticasone Propionate 100mcg DISKUS® BID Alone

This study will last up to 62 weeks. You will visit the clinic up to 17 times. Certain clinic visits will include physical examination, medical history review and lung function tests. The purpose of this study is to see if one asthma drug (fluticasone propionate/salmeterol) is better in reducing the number of asthma exacerbations compared with another drug (fluticasone propionate alone)