Advent calendar December 7: Apollo 17

On December 7, 1972, Apollo 17 launched on the last flight to the moon. Apollo 18 - 20 were canceled due to budget cuts (familiar story). I guess this is party good, otherwise there wouldn't be any Saturn Vs fully intact in museums to drool over. Apollo 17 was the longest manned lunar landing flight; longest total lunar surface extravehicular activities; largest lunar sample return, and longest time in lunar orbit.