Almost 9 million children in the United States have asthma, and it is a leading cause of hospitalizations and school absenteeism. Common asthma symptoms include wheezing, shortness of breath, chest tightness, and coughing. While there is no cure for asthma, most children who receive proper treatment are able to control symptoms and lead a normal life. Asthma is commonly treated with two types of medications: long-term control medication, such as inhaled corticosteroids (ICS), which is taken on a regular schedule to prevent symptoms and keep asthma under control, and quick-relief, or "rescue" medication, such as albuterol, which is used on an as-needed-basis with the onset of symptoms or an asthma attack. The purpose of this study is to assess the impact and severity of asthma exacerbations that occur in children with mild persistent asthma who are receiving ICS on a daily basis plus ICS and albuterol as rescue medications.