Mary Claire Foley, center left, 16, embraces Ariana Skafidas, 16, students at Henry B. Plant High School at Curtis Hixon Park in downtown Tampa, Fla., Monday, Feb. 19, 2018, as they raise their lights during a vigil to honor victims of the recent shooting at Marjory Stoneman Douglas High School in Parkland, Fla.
Mary Claire Foley, center left, 16, embraces Ariana Skafidas, 16, students at Henry B. Plant High School at Curtis Hixon Park in downtown Tampa, Fla., Monday, Feb. 19, 2018, as they raise their lights during a vigil to honor victims of the recent shooting at Marjory Stoneman Douglas High School in Parkland, Fla. Tampa Bay Times
Mary Claire Foley, center left, 16, embraces Ariana Skafidas, 16, students at Henry B. Plant High School at Curtis Hixon Park in downtown Tampa, Fla., Monday, Feb. 19, 2018, as they raise their lights during a vigil to honor victims of the recent shooting at Marjory Stoneman Douglas High School in Parkland, Fla. Tampa Bay Times

Nationwide social media threat puts North Texas schools on alert

February 22, 2018 10:35 AM