Scott Friedlein, emergency services coordinator, Christie Clinic Illinois Marathon
Charles Simpson, assistant secretary for response and recovery operations, California Emergency Management Agency
Bill Braniff, executive director, National Consortium for the Study of Terrorism and Responses to Terrorism (START) at the University of Maryland
The bombings at the Boston Marathon have lead to heightened security across the world. Organizers of the London Marathon contacted local police to discuss increased security measures. Officials in California monitored its emergency system after the blast.