- From Louisiana to Texas, this week has been marked by one tragic shooting after the next
- Juliette Kayyem: Though you may not be able to shield your kids from the violence, there are steps you can take to ease their nerves.
CNN national security analyst Juliette Kayyem is the author of the best-selling "Security Mom: An Unclassified Guide to Protecting Our Homeland and Your Home." She is a professor at Harvard's Kennedy School, a former assistant secretary of homeland security in the Obama administration and founder of Kayyem Solutions, a security consulting firm. The opinions expressed in this commentary are hers.
(CNN)The violence that has overwhelmed this nation over the last 48 hours is inexplicable in many ways, and yet familiar in others. Killings by cops, cops being killed: name the city -- Dallas, Baton Rouge or any other -- and then add on a mass shooting in Orlando and international terrorism in Turkey, Bangladesh and Iraq.