Obama signs 23 executive actions on gun violence after Sandy Hook demands assault weapons ban

Three weeks after gunman Adam Lanza kills 20 first-grade students and 6 staff at Sandy Hook Elementary School in Newtown, Connecticut, President Obama signs 23 executive actions on gun violence prevention and calls on Congress to pass an assault weapons ban, universal background checks, and a magazine capacity limit. The legislative package is introduced by Dianne Feinstein in the Senate. Senate Republicans filibuster the background checks bill in April 2013 despite 90% public support, prompting Obama to declare it "a shameful day for Washington."