Either that, or maybe one of the tank crew died and u didnt noticed. If u r sure that all 3 r alive, then just look around for the other one, bring them to the tank and wait until all 3 r next to the tank or very close to it. The mission should end, after that, u will love the next mission
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*GEL*DeathStrike[gm]
Gods Elite Legion
www.godselitelegion.s5.com