Massive Spoiler
So there I was, going through all the missions on GTA when I suddenlt get to a mission where I am told to fly to Liberty City, which instantly puts me in disbelief, but no I'm now flying a Shamal over the sea, expecting to be recalled or shot down at any moment. I keep on flying and all of a sudden I'm in a snow-encrested Liberty City. Completly suprised, even if I can do only a titchy mission. Has anyone managed to get back there??