"It's like my body keeps score," the mom of five tells TODAY.com about her reaction to the anniversary of the mass shooting at Columbine High School on April 20, 1999. One teacher and 12 students were ...

A shooting at Mexico's Teotihuacán pyramids on Monday left a Canadian woman dead and six injured as the shooter later died ...

The Pulse nightclub shooting changed Orlando forever, and it also changed the way law enforcement agencies across the country ...

MEXICO CITY — The gunman who opened fire on tourists at Mexico's iconic Teotihuacan pyramids carried materials that were apparently related to the 1999 shooting at Columbine High School, authorities ...

Three upstate New York students were arrested in an alleged school shooting plot, with one accused of writing that "no one would be spared" in a detailed plan to bring the violence of Columbine and ...

A girl who wrote to God in her diaries, a boy with learning disabilities who was just learning to like who he was and a teen who would spend every free minute fishing were among the 13 victims of the ...

Pauls Valley High School Principal Kirk Moore was shot in the leg but still managed to tackle a former student accused of opening fire inside the school, preventing further harm ...

MEXICO CITY — The gunman who killed a Canadian tourist and wounded 13 others at Mexico’s famed Teotihuacan pyramids had planned the attack days in advance, officials said Tuesday, as evidence pointed ...

April 21 (UPI) --Mexican authorities have identified Julio César Jasso Ramírez as the man who opened fire Monday at the Teotihuacan pyramids, killing one woman and himself. Thirteen others were either ...