PRIOR CONCURRENT THERAPY: Biologic therapy: At least 3 weeks since prior biologic therapy No concurrent immunotherapy (during radiotherapy (RT) and RSR13 administration) Chemotherapy: No prior systemic chemotherapy No concurrent chemotherapy (during RT and RSR13 administration) Endocrine therapy: No concurrent hormonal therapy (during RT and RSR13 administration) Radiotherapy: No prior radiotherapy to the thorax Surgery: At least 1 week since prior diagnostic thoracoscopy OR At least 3 weeks since prior thoracotomy and recovered No prior total surgical resection Other: At least 3 weeks since other prior investigational agents or devices No prior RSR13