Guns killed nearly 44,000 Americans in 2020, a higher number than in any other year in the past two decades. Meanwhile, a spate of mass shootings in the spring brought gun violence to the forefront of the national conversation again. Susan Sorenson, PhD, director of the Ortner Center on Violence and Abuse at the University of Pennsylvania, discusses what we know about the causes and consequences of gun violence in the United States and whether research can offer any insight into how to prevent it.

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