Catch up on the latest from our gun safety movement: Monday night's tragedy at a Manhattan office building was the deadliest mass shooting in New York City in more than two decades. This mass shooting was like so many others before—because the shooter used an assault weapon:…

Catch up on the latest from our gun safety movement: Monday night's tragedy at a Manhattan office building was the deadliest mass shooting in New York City in more than two decades. This mass shooting was like so many others before—because the shooter used an assault weapon:…