The Fairfax County 911 Center in Virginia takes calls during Hurricane Sandy in 2012. It was relatively easy to locate callers when most people used landlines. But most 911 calls now come from cellphones, which can pinpoint a callers' location only within 100 to 300 meters.
Greg E. Mathieson Sr./Mai/Landov
Feminist critic Anita Sarkeesian, seen here filming her Tropes vs. Women web series, recently canceled a talk at Utah State University after the school received threats of a mass shooting at the event.