15. (14. continued) Patients with extrathoracic-only squamous cell NSCLC are eligible. Patients with only peripheral lung lesions (of any non squamous NSCLC histology, except small cell histology) will also be eligible (a peripheral lesion is defined as a lesion in which the epicenter of the tumor is </= 2 cm from the costal or diaphragmatic pleura in a three-dimensional orientation based on each lobe of the lung and is >/= 2 cm from the trachea, main, and lobar bronchi).