Marvel X-Men: Liberators #4 (1999) NM+ Wolverine, Nightcrawler, Colossus, Omega Red

The cataclysmic conclusion! A weakened Wolverine, a fugitive Colossus and a desperate Nightcrawler make a last ditch effort to free the captive mutant children from the Soviet "detainment center," Province 13. But Omega Red stands in their way--giving the corrupt General Sergei time enough to carry out his malicious master plan! Written by Joe Harris. Art by Phil Jimenez and John Stokes.