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Students from Harvest Collegiate High School form a circle around the fountain in Washington Square Park on March 14, 2018 in New York to take part in a national walkout to protest gun violence, one month after the shooting in Parkland, Florida, in which 17 people were killed. Students across the US walked out of classes on March 14, in a nationwide call for action against gun violence following the shooting deaths last month at a Florida high school. The nationwide protest is being held one month to the day after Nikolas Cruz, a troubled 19-year-old former student at Stoneman Douglas, unleashed a hail of gunfire on his former classmates. / AFP PHOTO / TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)

Students from Harvest Collegiate High School form a circle around the fountain in Washington Square Park on March 14, 2018 in New York to take part in a national walkout to protest gun violence, one month after the shooting in Parkland, Florida, in which 17 people were killed. Students across the US walked out of classes on March 14, in a nationwide call for action against gun violence following the shooting deaths last month at a Florida high school. The nationwide protest is being held one month to the day after Nikolas Cruz, a troubled 19-year-old former student at Stoneman Douglas, unleashed a hail of gunfire on his former classmates. / AFP PHOTO / TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
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AFP TIMOTHY A. CLARY

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Students from Harvest Collegiate High School form a circle around the fountain in Washington Square Park on March 14, 2018 in New York to take part in a national walkout to protest gun violence, one month after the shooting in Parkland, Florida, in which 17 people were killed. Students across the US walked out of classes on March 14, in a nationwide call for action against gun violence following the shooting deaths last month at a Florida high school. The nationwide protest is being held one month to the day after Nikolas Cruz, a troubled 19-year-old former student at Stoneman Douglas, unleashed a hail of gunfire on his former classmates. / AFP PHOTO / TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)

Students from Harvest Collegiate High School form a circle around the fountain in Washington Square Park on March 14, 2018 in New York to take part in a national walkout to protest gun violence, one month after the shooting in Parkland, Florida, in which 17 people were killed. Students across the US walked out of classes on March 14, in a nationwide call for action against gun violence following the shooting deaths last month at a Florida high school. The nationwide protest is being held one month to the day after Nikolas Cruz, a troubled 19-year-old former student at Stoneman Douglas, unleashed a hail of gunfire on his former classmates. / AFP PHOTO / TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
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AFP TIMOTHY A. CLARY

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Students from Harvest Collegiate High School march from in Washington Square Park on March 14, 2018 in New York to take part in a national walkout to protest gun violence, one month after the shooting in Parkland, Florida, in which 17 people were killed. Students across the US walked out of classes on March 14, in a nationwide call for action against gun violence following the shooting deaths last month at a Florida high school. The nationwide protest is being held one month to the day after Nikolas Cruz, a troubled 19-year-old former student at Stoneman Douglas, unleashed a hail of gunfire on his former classmates. / AFP PHOTO / TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)

Students from Harvest Collegiate High School march from in Washington Square Park on March 14, 2018 in New York to take part in a national walkout to protest gun violence, one month after the shooting in Parkland, Florida, in which 17 people were killed. Students across the US walked out of classes on March 14, in a nationwide call for action against gun violence following the shooting deaths last month at a Florida high school. The nationwide protest is being held one month to the day after Nikolas Cruz, a troubled 19-year-old former student at Stoneman Douglas, unleashed a hail of gunfire on his former classmates. / AFP PHOTO / TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
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AFP TIMOTHY A. CLARY

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NEW YORK, NY - MARCH 14: Students from surrounding schools gather at Zuccotti Park in lower Manhattan to mark one month since the high school shooting in Parkland, Florida and to demand an end to gun violence on March 14, 2018 in New York City.. Students across the nation walked out of their classrooms at 10 a.m. across time zones for 17 minutes to show solidarity for the 17 killed in the Valentine's Day attack at Marjory Stoneman Douglas High School and to make a nationwide appeal for changes in gun laws. (Photo by Spencer Platt/Getty Images)

NEW YORK, NY - MARCH 14: Students from surrounding schools gather at Zuccotti Park in lower Manhattan to mark one month since the high school shooting in Parkland, Florida and to demand an end to gun violence on March 14, 2018 in New York City.. Students across the nation walked out of their classrooms at 10 a.m. across time zones for 17 minutes to show solidarity for the 17 killed in the Valentine's Day attack at Marjory Stoneman Douglas High School and to make a nationwide appeal for changes in gun laws. (Photo by Spencer Platt/Getty Images)
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Getty Images News Spencer Platt

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NEW YORK, NY - MARCH 14: Joined by New York Governor Andrew Cuomo, students from surrounding schools gather at Zuccotti Park in lower Manhattan to mark one month since the high school shooting in Parkland, Florida and to demand an end to gun violence on March 14, 2018 in New York City.. Students across the nation walked out of their classrooms at 10 a.m. across time zones for 17 minutes to show solidarity for the 17 killed in the Valentine's Day attack at Marjory Stoneman Douglas High School and to make a nationwide appeal for changes in gun laws. (Photo by Spencer Platt/Getty Images)

NEW YORK, NY - MARCH 14: Joined by New York Governor Andrew Cuomo, students from surrounding schools gather at Zuccotti Park in lower Manhattan to mark one month since the high school shooting in Parkland, Florida and to demand an end to gun violence on March 14, 2018 in New York City.. Students across the nation walked out of their classrooms at 10 a.m. across time zones for 17 minutes to show solidarity for the 17 killed in the Valentine's Day attack at Marjory Stoneman Douglas High School and to make a nationwide appeal for changes in gun laws. (Photo by Spencer Platt/Getty Images)
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Getty Images News Spencer Platt