It has been 20 years since two heavily armed young men in dark trenchcoats entered a Colorado high school and launched a bloody attack that seared the word "Columbine" into the American psyche, ...

There have been at least 75 school shootings in the United States so far this year, as of December 13. Forty-three were on college campuses, and 32 were on K-12 school grounds. The incidents left at ...