A Study of Gemcitabine-Carboplatin Plus Necitumumab (LY3012211) in Chemotherapy-Naïve Participants With Locally Advanced or Metastatic Squamous Non-Small Cell Lung Cancer (NSCLC)

Inclusion Criteria:

* Have confirmed diagnosis of locally advanced or metastatic NSCLC in Cohort 1 and metastatic NSCLC in Cohort 2, predominantly squamous histology. Squamous NSCLC diagnosis must be confirmed by histology or cytology local pathology report.
* Participants in Cohort 1 are required to have epidermal growth factor receptor (EGFR) protein expressing tumor (defined by local immunohistochemistry test). This is not required for participants in Cohort 2.
* Measurable disease at the time of study entry as defined by Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1)
* The participant has an Eastern Cooperative Oncology Group performance status (ECOG PS) score of 0-1
* Have discontinued all previous treatments for cancer and recovered from the acute effects of therapy: Biologic agents (for example, antibodies) and Immunotherapy ≥4 weeks; Chest radiotherapy ≥4 weeks; Major surgery, excluding biopsy ≥4 weeks)
* The participant has archived tumor tissue available for biomarker analyses.
* Participants in Cohort 2 are required to have received 1 prior single-agent immune checkpoint inhibitor for squamous NSCLC.

Exclusion Criteria:

* The participant has nonsquamous NSCLC
* The participant has received prior anticancer therapy targeting the EGFR, vascular endothelial growth factor (VEGF), or VEGF receptor.
* The participant has received previous chemotherapy (including concurrent chemoradiation) for advanced NSCLC (participants who have received neo-adjuvant and/or adjuvant chemotherapy are eligible if the last administration occurred at least 1 year prior to start of therapy).
* The participant has brain metastases that are symptomatic or require ongoing treatment with steroids or anticonvulsants.
* The participant has a bleeding tumor.
* The participant has a history of arterial or venous thromboembolism within 3 months prior to study enrollment.
* The participant has a history or evidence of current clinically-relevant coronary artery disease of current ≥ Class III as defined by Canadian Cardiovascular Society Angina Grading Scale (Campeau 1976) or congestive heart failure of current ≥ Class III as defined by the New York Heart Association.
* The participant has experienced myocardial infarction within 6 months prior to study enrollment.