Fluoromisonidazole F-18 Active Not Recruiting Phase 2 Trials for Stage IIIB Non-Small Cell Lung Cancer AJCC v7 / Stage IIIA Non-Small Cell Lung Cancer AJCC v7 / Stage IIIB Lung Non-Small Cell Cancer AJCC v7 / Stage IIIb Non-small Cell Lung Cancer / Stage III Non-Small Cell Lung Cancer / Stage III Lung Non-Small Cell Cancer AJCC v7 / Stage IIIA Non-Small Cell Lung Cancer / Stage III Non-Small Cell Lung Cancer AJCC v7 / Stage IIIA Lung Non-Small Cell Cancer AJCC v7 Treatment