there has never been a mass shooting by the government of this country. there have been a few armed stand offs, with people who seem to try to actually practice the horseshit that rob roy spews, but there has NEVER been an incident where the police or the national guard used lethal force against a group of American citizens...ever. water cannons, rubber bullets, tear gas...yes. i'm sure there have ben isolated fatalities in those events, but never live ammo, never anything that hasn't been judged "nonlethal"...
i don't know about the g7, but that kind of shit makes big news, and i've been watching the news since the early 80s, and don't recall one such incident.