Only one of these mass killings took place in the 1970s, then 5 in the 1980s, 2 in the 1990s, and 4 between 2000 and 2011. Since 2012, there have been 13 of them. Think about that. In the last seven years, there have been more mass shooting in America than in the entire 20th century.
At such a time in our nation, many things need to be considered. But the biggest one is this. What changed?