Beth Walsh holds a sign as teens kick off a voter registration rally, a day ahead of the 19th anniversary of the massacre at Columbine High School, in Littleton, Colorado, U.S., April 19, 2018. Show moreShow less
Tom Sullivan, father of Alex Sullivan, who was killed in the Aurora theater shooting, wears a hat with the names of the victims as teens kick off a voter registration rally, a day ahead of the 19th anniversary of the massacre at Columbine High School, in Littleton, Colorado, U.S., April 19, 2018. Show moreShow less
Girls hold signs as teens kick off a voter registration rally, a day ahead of the 19th anniversary of the massacre at Columbine High School, in Littleton, Colorado, U.S., April 19, 2018. Show moreShow less
A woman holds a sign as teens kick off a voter registration rally, a day ahead of the 19th anniversary of the massacre at Columbine High School, in Littleton, Colorado, U.S., April 19, 2018. Show moreShow less
A man holds a sign as teens kick off a voter registration rally, a day ahead of the 19th anniversary of the massacre at Columbine High School, in Littleton, Colorado, U.S., April 19, 2018.Show moreShow less
Emmy Adams hugs another student as teens kick off a voter registration rally, a day ahead of the 19th anniversary of the massacre at Columbine High School, in Littleton, Colorado, U.S., April 19, 2018. Show moreShow less
Former Columbine principal Frank DeAngelis looks on as teens kick off a voter registration rally, a day ahead of the 19th anniversary of the massacre at Columbine High School, in Littleton, Colorado, U.S., April 19, 2018. Show moreShow less
Valerie Stanley (L) and Ashley Torr hug as teens kick off a voter registration rally, a day ahead of the 19th anniversary of the massacre at Columbine High School, in Littleton, Colorado, U.S., April 19, 2018. Show moreShow less
A man holds a sign as teens kick off a voter registration rally, a day ahead of the 19th anniversary of the massacre at Columbine High School, in Littleton, Colorado, U.S., April 19, 2018. Show moreShow less
Former Columbine principal Frank DeAngelis looks on as teens kick off a voter registration rally, a day ahead of the 19th anniversary of the massacre at Columbine High School, in Littleton, Colorado, U.S., April 19, 2018.Show moreShow less
People fill out signs as teens kick off a voter registration rally, a day ahead of the 19th anniversary of the massacre at Columbine High School, in Littleton, Colorado, U.S., April 19, 2018. Show moreShow less
People fill out signs as teens kick off a voter registration rally, a day ahead of the 19th anniversary of the massacre at Columbine High School, in Littleton, Colorado, U.S., April 19, 2018. Show moreShow less
Quin Coppedge (L) and Joni Coppedge hold signs as teens kick off a voter registration rally, a day ahead of the 19th anniversary of the massacre at Columbine High School, in Littleton, Colorado, U.S., April 19, 2018.Show moreShow less
Marjory Stoneman Douglas High School survivor Carlos "Carlitos" Rodriguez speaks as teens kick off a voter registration rally, a day ahead of the 19th anniversary of the massacre at Columbine High School, in Littleton, Colorado, U.S., April 19, 2018. Show moreShow less
Delaney Peterson looks on as teens kick off a voter registration rally, a day ahead of the 19th anniversary of the massacre at Columbine High School, in Littleton, Colorado, U.S., April 19, 2018. Show moreShow less
A man holds a flag as teens kick off a voter registration rally, a day ahead of the 19th anniversary of the massacre at Columbine High School, in Littleton, Colorado, U.S., April 19, 2018. Show moreShow less