"It is time to water the tree of liberty" said the sign carried by a gun-toting protester milling outside President Obama's town-hall meeting in New Hampshire two weeks ago. The Thomas Jefferson quote that inspired this message, of course, said nothing about water: "The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants." That's the beauty of a gun — you don't have to spell out the "blood." The protester was a nut. America has... (GunPolicy.org)