This Feb. 21, 2018 file photo shows students at the entrance to the office of Florida Gov. Rick Scott with boxes of petitions for gun control reform, at the state Capitol in Tallahassee, Fla. Over a dozen students and teachers were killed on Valentine's Day in a mass shooting at Marjory Stoneman Douglas High School in Parkland, Fla. The latest mass shooting at the Florida high school has some pondering the improbable: Could this one actually bring some measure of change?(AP Photo/Gerald Herbert, File)
