Carboplatin, Irinotecan, and Radiation Therapy Followed By Docetaxel in Treating Patients With Newly Diagnosed Stage III Non-Small Cell Lung Cancer

RATIONALE: Drugs used in chemotherapy, such as carboplatin, irinotecan, and docetaxel, work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. Giving more than one drug (combination chemotherapy) may kill more tumor cells. Radiation therapy uses high-energy x-rays to kill tumor cells. Giving combination chemotherapy together with radiation therapy may kill more tumor cells. PURPOSE: This phase II trial is studying how well giving carboplatin and irinotecan together with radiation therapy followed by docetaxel works in treating patients with newly diagnosed stage III non-small cell lung cancer.