• Parkland student activist Emma Gonzalez, center left, hugs Patricia Oliver before a peace rally and march, Friday, June 15, 2018, in Chicago. Oliver's son, Joaquin Oliver, was shot and killed this year at a Florida high school. Photo: Annie Rice, AP / Copyright 2018 The Associated Press. All rights reserved.
Photo: Annie Rice, AP
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Parkland student activist Emma Gonzalez, center left, hugs Patricia Oliver before a peace rally and march, Friday, June 15, 2018, in Chicago. Oliver's son, Joaquin Oliver, was shot and killed this year at a Florida high school. less
Parkland student activist Emma Gonzalez, center left, hugs Patricia Oliver before a peace rally and march, Friday, June 15, 2018, in Chicago. Oliver's son, Joaquin Oliver, was shot and killed this year at a ... more
Photo: Annie Rice, AP
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Former U.S. Rep. Gabby Giffords speaks at a peace rally and march, Friday, June 15, 2018, in Chicago. Jennifer Hudson and Chance the Rapper were also among the celebrities who spoke at the event. A group of Florida high school shooting survivors started their nationwide bus tour registering young voters to help accomplish their vision for stricter gun laws at the rally on Chicago's South Side. less
Former U.S. Rep. Gabby Giffords speaks at a peace rally and march, Friday, June 15, 2018, in Chicago. Jennifer Hudson and Chance the Rapper were also among the celebrities who spoke at the event. A group of ... more
Photo: Annie Rice, AP
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Tyra Hemans, an alumnae of Marjory Stoneman Douglas High School in Parkland, Fla., watches an art performance by Manuel Oliver at a peace rally and march, Friday, June 15, 2018, in Chicago. A group of Florida high school shooting survivors started their nationwide bus tour registering young voters to help accomplish their vision for stricter gun laws at the rally on Chicago's South Side. less
Tyra Hemans, an alumnae of Marjory Stoneman Douglas High School in Parkland, Fla., watches an art performance by Manuel Oliver at a peace rally and march, Friday, June 15, 2018, in Chicago. A group of Florida ... more
Photo: Annie Rice, AP
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CHICAGO (AP) — A group of Florida high school shooting survivors started their nationwide bus tour registering young voters to help accomplish their vision for stricter gun laws at a rally on Chicago's South Side.

Kyrah Simon from Marjory Stoneman Douglas High School in Parkland, where 17 people died on Feb. 14, told the crowd largely made up of young people Friday evening that their voices matter.

Former Rep. Gabby Giffords, who was gravely wounded in a 2011 shooting, told the crowd to vote on Election Day to effect the change they want. Entertainers Jennifer Hudson, Chance the Rapper and will.i.am also appeared.

The Parkland students are planning more than 25 stops during a two-month tour targeting communities rocked by gun violence or where lawmakers supported by the National Rifle Association are seeking office.

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This version of the story corrects the year when Gabby Giffords was gravely wounded to 2011 from 2012.