Additional Study Information: The purpose of this study is to test the effectiveness (how well the drug works), safety, and tolerability of an investigational drug called nivolumab on patients with advanced or metastatic non-small cell lung cancer . Nivolumab is an antibody (a type of human protein) that is being tested to see if it will allow the bodys immune system to work against tumor cells. An investigational drug is one that is not approved by the FDA or any other agency and is being studied and developed.