This study is designed to evaluate and compare changes in pulmonary function (FEV1(forced expiratory volume in 1 second) FVC(forced vital capacity), TLC (total lung capacity) and DLco) in subjects enrolled in 1 of 3 parent trials (MKC-TI-161, MKC-TI-162 or MKC-TI-166). Up to 100 subjects with Type I and Type II diabetes in the TI Inhalation Powder arm, and 100 subjects with Type I and Type II diabetes in the comparator arm will be enrolled. Each subject will undergo 6 PFT assessments over the course of the parent trial.