En fotos: Así se vivió la protesta de los estudiantes en contra del porte de armas de fuego

UNION CITY, CA – MARCH 14: A James Logan High School student holds a sign during a walk out demonstration on March 14, 2018 in Union City, California. 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. Justin Sullivan/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

UNION CITY, CA – MARCH 14: James Logan High School students hold signs honoring students killed at Marjory Stoneman Douglas High School as they stage a die in and observe a moment of silence during a walk out demonstration on March 14, 2018 in Union City, California. 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. Justin Sullivan/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

UNION CITY, CA – MARCH 14: James Logan High School students stage a die in and observe a moment of silence during a walk out demonstration on March 14, 2018 in Union City, California. 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. Justin Sullivan/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

SEATTLE, WA – MARCH 14: Randy Simon gives a high five to students at Ballard High School during a walkout to address school safety and gun violence on March 14, 2018 in Seattle, Washington. Students across the nation walked out of their classrooms 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. Karen Ducey/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

PHILADELPHIA, PA – MARCH 14: Philadelphia area students participate in a demonstration to address school safety and gun violence on March 14, 2018 at the school district building in Philadelphia, Pennsylvania. Students across the country are walking out of classes for 17 minutes to honor the lives of the 17 people killed at Stoneman Douglas High School in Florida this past February. Jessica Kourkounis/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

PHILADELPHIA, PA – MARCH 14: Philadelphia area students participate in a demonstration to address school safety and gun violence on March 14, 2018 at the school district building in Philadelphia, Pennsylvania. Students across the country are walking out of classes for 17 minutes to honor the lives of the 17 people killed at Stoneman Douglas High School in Florida this past February. Jessica Kourkounis/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

CHICAGO, IL – MARCH 14: Students share thoughts about gun violence after walking out of their classes at Community Links High School in the city's violence-prone Little Village neighborhood on the city's Westside on March 14, 2018 in Chicago, Illinois. The walkout was part of a nationwide school walkout organized to recognize the 17 victims of the Marjory Stoneman Douglas High School shooting last month in Parkland, Florida. More than 2,000 schools participated in the event. Scott Olson/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

CHICAGO, IL – MARCH 14: Students share thoughts about gun violence after walking out of their classes at Community Links High School in the city's violence-prone Little Village neighborhood on the city's Westside on March 14, 2018 in Chicago, Illinois. The walkout was part of a nationwide school walkout organized to recognize the 17 victims of the Marjory Stoneman Douglas High School shooting last month in Parkland, Florida. More than 2,000 schools participated in the event. Scott Olson/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

CHICAGO, IL – MARCH 14: Students share thoughts about gun violence after walking out of their classes at Community Links High School in the city's violence-prone Little Village neighborhood on the city's Westside on March 14, 2018 in Chicago, Illinois. The walkout was part of a nationwide school walkout organized to recognize the 17 victims of the Marjory Stoneman Douglas High School shooting last month in Parkland, Florida. More than 2,000 schools participated in the event. Scott Olson/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

DENVER, CO – MARCH 14: High school students protest against gun violence on the Colorado State Capitol grounds on March 14, 2018 in Denver, Colorado. It was one month ago today that a gunman killed 17 people at Marjory Stoneman Douglas High School in Parkland, Florida. Ross Taylor/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

DENVER, CO – MARCH 14: High school students protests against gun violence on the Colorado State Capitol grounds on March 14, 2018 in Denver, Colorado. It was one month ago today that a gunman killed 17 people at Marjory Stoneman Douglas High School in Parkland, Florida. Ross Taylor/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

A student places a memorial ribbon on her shorts on March 14, 2018, as students from Venice High School in Venice, California joined others in a nationwide walkout off campus for 17 minutes to protest gun violence and in honour to those who were killed a month ago.o. 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 / FREDERIC J. BROWN

Students from Venice High School in Venice, California wear shirts in honour of the victims on March 14, 2018, where students joined others in a nationwide walkout for 17 minutes to protest gun violence and in honour to the Parkland victims who were killed a month ago. 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 / FREDERIC J. BROWN