When Lane Murdock, a high school sophomore, heard that 17 high school students and educators had been killed in a shooting in Parkland, Fla., she says she felt numb.
To her, and so many others, mass shootings can feel all too common in the U.S.
"In the time I've been in high school we've had the Pulse, Las Vegas and now, [the Parkland] shooting," Murdock says.