From left, CAPA High School students Christian Carter, Mia Arrington and Cheyenne Springette lead chants as they march down Liberty Ave. during a walk out in solidarity with other high schools across the country to show support for the Florida school shooting victims on Wednesday. The students stood silent for 17 minutes in Market Square for the 17 victims of the Marjory Stoneman Douglas High School in Parkland, Fla. Officials were originally going to discipline the students but later changed their tune to say they will be having an open discussion with them. (Photo by Stephanie Strasburg/Post-Gazette) #Pittsburgh #PGH #412 #Parkland #NeverAgain #MarketSquare #banguns #CAPA #schoolshooting #protest #schoolshootingprotest #PGPhotos Editor's note: this caption has been edited to reflect school officials have changed their stance on disciplining the students for walking out.