Nelba Márquez-Greene knows what it's like to lose a loved one in a mass shooting. On Dec. 14, 2012, her 6-year-old daughter Ana Márquez-Greene was shot and killed during the Sandy Hook massacre in Newtown, Connecticut.
Ever since, Márquez-Greene and her husband, Jimmy Greene, have been tireless advocates for gun safety. They've called on Congress to take action to mitigate future mass shootings — only to have their concerns brushed off. Time and again, they've watched Congress stand idly by each time a mass shooting took place.