The fact that this is plastered all over the Internet is just a testament about how this sort of thing rarely ever happens. People are killed every day because of other negligent stuff and not a word. It's not surprising though since most of the people who scream gun control are the same people who voted Obama into the White House not but twice. You know who else was for gun control? Hitler, Stalin, Qaddafi, Castro, Idi Amin, Mao, Pol Pot, Kim Jong-Il, etc.
It should also be worth noting that fully automatic weapons are illegal for civillians to own, and more people are killed by choking on forks than in gun ranges each year.