(Andrew Harnik | AP file photo) Emma Gonzalez, a survivor of the mass shooting at Marjory Stoneman Douglas High School in Parkland, Fla., closes her eyes and cries as she stands silently at the podium and times the amount of time it took the Parkland shooter to go on his killing spree during the "March for Our Lives" rally in support of gun control in Washington, Saturday, March 24, 2018.