Phase II Trial to Correlate Radiographic Response Induced By Gefitinib With Mutations in the Protein-Tyrosine Kinase Domain of the EGF Receptor Gene

The purpose of this research study is to: * see if gefitinib pills can shrink Stage 1 or 2 non-small cell lung cancers before surgery * see if your non-small cell lung cancer has a mutation in a certain part of the EGFR gene * see if patients whose tumor does shrink with gefitinib treatment are more likely to have a mutation in a certain part of the EGFR gene * see if the pattern of protein expression in the blood is related to the tumor's sensitivity or resistance to gefitinib treatment. * see if expression of certain genes in the tumor are related to the tumor's sensitivity or resistance to gefitinib treatment.