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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Students walk out to vote for their lives