I invoke the M*A*S*H Rule.....No show should run longer than the war it portrayed.
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Then M*A*S*H, started in 1972, should still be running until out next presidential election in 2016. The war represented in that show was the Cold War (of which the Korean Police Action was but a side show).
I suppose they could have reunited them all in Vietnam.
Well, officially to Korean War is still on...