Hundreds of U.S. schools will supplement fire drills and tornado training next fall with simulations of school shootings. In response to the December shootings by an intruder at Sandy Hook Elementary School in Newtown, Connecticut, several states have enacted or are considering laws that require more and new types of school safety drills, more reporting to state agencies about safety planning, and new audits of school security. Powerful tornadoes this week in Oklahoma, however, may also prompt changes in the ways schools attempt to keep students safe in cases of natural disasters. Meanwhile, proposed mandates for emergency-preparedness drills and planning are getting traction quickly in many statehouses this legislative season, and dozens of similar bills have yet to be considered.