Heartsick after the December 14, 2012 shootings at the Sandy Hook Elementary School in Newtown, CT., Watts, a stay-at-home mother, reached out to other outraged and frustrated mothers on Facebook. In her inspiring book, she recounts how that core group of concerned individuals grew into Moms Demand Action for Gun Sense in America, a nonprofit which now has over 4.5 million members and chapters active in all fifty states. Modeled on MADD and dedicated to protecting children from gun violence, Moms Demand Action has challenged the powerful gun lobby, and Watts—aka “the NRA’s worst nightmare”—shows how the group has successfully effected change at the local, state, and national levels. Presented in conjunction with Gun Violence Awareness Month. Watts will be in conversation with Karen Tumulty, national political correspondent for The Washington Post.