Inclusion Criteria:  Patients who underwent elective wedge resection, segmentectomy, lobectomy, or bilobectomy for suspected non-small cell lung cancer Patients that have reviewed and signed the Informed Consent Form, had an opportunity to ask questions, and consent to have their de-identified data included in the study Patients who have an air leak on the morning of postoperative Day 3 Age ≥18 years old  Exclusion Criteria:  Patients who undergo pneumonectomy, sleeve lobectomy, chest wall or diaphragm resection, or bilateral procedures. Age ≤ 18 years old Women who are pregnant