Dick Cheney is now the first Vice-President to have shot someone since Aaron Burr. It was in 1804 while serving as VP under Thomas Jefferson that Burr had his famous duel with Alexander Hamilton. That was the first and last time a sitting veep got someone with a firearm... until this weekend.
(I always thought that it shoulda been Burr who got his face on the ten-dollar bill... I mean, he won that fight, didn't he?)