Efficacy and Safety of Pembrolizumab (MK-3475) With Platinum Doublet Chemotherapy as Neoadjuvant/Adjuvant Therapy for Participants With Resectable Stage II, IIIA, and Resectable IIIB (T3-4N2) Non-small Cell Lung Cancer (MK-3475-671/KEYNOTE-671)

Inclusion Criteria: * Have previously untreated and pathologically confirmed resectable Stage II, IIIA, or IIIB (N2) NSCLC. * If male, must agree to use contraception or practice abstinence as well as refrain from donating sperm during the treatment period and for the time needed to eliminate each study intervention after the last dose of study intervention. * If female, may participate if not pregnant or breastfeeding, and at least one of the following conditions apply: 1) not a woman of childbearing potential (WOCBP); or 2) a WOCBP who agrees to follow contraceptive guidance during the treatment period and for the time needed to eliminate each study intervention after the last dose of study intervention and agrees not to donate eggs (ova, oocytes) to others or freeze/store for her own use for the purpose of reproduction during this period. * Have available formalin-fixed paraffin embedded (FFPE) tumor tissue sample blocks for submission. If blocks are not available, have unstained slides for submission for central programmed death-ligand 1 (PD-L1) testing. * Have an Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1 within 10 days of randomization. * Have adequate organ function. Exclusion Criteria: * Has one of the following tumor locations/types:1) NSCLC involving the superior sulcus; 2) Large cell neuro-endocrine cancer (LCNEC); or 3) Sarcomatoid tumor. * Has a history of (non-infectious) pneumonitis /interstitial lung disease that required steroid…