Pennsylvania man accused of planning high school shooting around this month’s Columbine anniversary

Police in Pennsylvania have arrested a 20-year-old man accused of plotting a mass shooting at a high school later this month, one day after the anniversary of the Columbine massacre.

​ Police in Pennsylvania have arrested a 20-year-old man accused of plotting a mass shooting at a high school later this month, one day after the anniversary of the Columbine massacre. Read More Breaking News, Latest News and Videos | CNN