WASHINGTON, DC - JULY 05: Avery Drobnyk, (bottom), 7, and her sister Eleanor Drobnyk, 5, make anti-gun posters before marching with their mom to Capitol Hill, July 5, 2016 in Washington, DC. The group "D.C. Moms and Dads for Rational Gun Safety Legislation" held a rally then marched the US Capitol to urge members of Congress to come up with meaningful national legislation to prevent gun violence. (Photo by Mark Wilson/Getty Images)