S.E. Smith, RS
The Safeway parking lot near Tucson, Arizona, was bustling on January 8th, 2011, as people lined up to participate in a “Congress on Your Corner” event with newly reelected Congresswoman Gabby Giffords. As the three-term Democrat began talking with constituents, a man opened fire on the crowd with a semiautomatic pistol, killing six people and severely injuring Giffords. Even in an era of nearly constant mass shootings, the attack on a sitting member of Congress stood out. It was followed with calls for more robust gun control.
Source: Real Clear Politics