Celebrities were also among those who donated shoes, ABC reported.
A massive and powerful display in Washington Tuesday calling for an end to gun violence.
The shoes will be taken off the lawn around 2 p.m. Tuesday, but Soria said that all 7,000 pairs will be donated to charity.
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The jury deadlocked and a mistrial was declared in the case of a fourth defendant, energy company executive Peter Galbraith Kelly. Andrew Cuomo says the conviction of his former top aide is "personally painful" but he respects the jury's decision.
"The culture on guns is shifting, and we can all feel it", she said. Her daughter survived the shooting.
But the idea has drew condemnation from educators, who said schools will be less safe, not more, with more guns around.
According to marchforourlives.com, which has a map of planned protests across the country, there are also events planned for Clearwater, Pinellas Park, Brandon and Plant City. "Together they held up a sign that read "#NotOneMore", indicating that no more children should have to go through the pain, caused by gun violence. The symbolic shoe demonstrations likely draw inspiration from the renowned memorial at the Hungarian Parliament in Budapest that honors lives lost during the Holocaust. This activation is a precursor to the March 14 National School Walkout, where thousands of students across the nation plan to walk out of their classes as a demonstration of their outrage to the lack of movement on gun control.
Students from Marjory Stoneman Douglas High School in Parkland, including Cameron Kasky, Alex Wind, Emma Gonzalez and David Hogg, began promoting the demonstration days after surviving the February 14 shooting massacre at the school.
This isn't the first display addressing gun violence from Avaaz.