WASHINGTON - The United States has seen heightened gun violence in 2021, which exposed the country's deep-rooted social and political problems, the Cable News Network (CNN) has recently reported. The year of 2021 was a brutal year for gun violence in the United States, where more than two-thirds of the country's most populous cities have seen more homicides in 2021 than last year, according to a report by CNN on Tuesday. The toll of this violence isn't spread equally across the...