locations of these shootings this weekend, three people killed there, 11 wounded after multiple shooters in this case opened fire at a crowd. first, polo, begin with what we know about the shooting there in philadelphia. reporter: and, jim, unlike those cold-blooded massacres we saw play out or carried out in buffalo and texas, this started as a street brawl but it took a violent and deadly turn when some of the convince involved according to police used firearms opening fire sending people scrambling for safety. in the end three people were killed with about 11 people injured. investigators believe among the dead was one of the individuals involved in that scuffle, but, still, the police commissioner making it clear that there were also innocent bystanders among the victims and that is fueling her frustration and that of police officials in cities across the country this morning. this is the scene following another mass shooting in the united states, this time in philadelp
experience essentially the number of mass shooting-related fatalities decreased to zero for the 23 years following the implementation of their assault weapons ban. and you see similar experiences in the uk, more recently canada has instituted legislation to ban assault-type weapons or weapons characterized as assault-type weapons and that experience s you know, currently being reviewed and the conclusions from that are still pen pending. to zero in australia and people often make a comparison saying that s a better comparison for the u.s. given frontier culture, more of a history with guns. i do want to ask you because the situation in this country has changed since that assault weapons ban, one big way there are a lot more guns, gun sales have gone up by multiples. would another assault i know you are a backwards looker here, but based on what the data points to, would another assault ban weapons ban today have an