Treatment during the induction phase will be administered in six 21-day cycles. During cycles 1 and 2, gemcitabine plus cisplatin will be administered WITHOUT ipilimumab. During cycles 3-6, combination therapy with gemcitabine, cisplatin, plus ipilimumab will be administered. Patients without evidence of disease progression (by irRC) after completion cycle 6 will continue single-agent ipilimumab maintenance every 3 months.