Gun Laws In The Us

US: Father surrenders after killing four children, two adults in Houston

Killed were two boys, ages 4 and 14; two girls, ages 7 and 9; a 39-year-old man and a 33-year-old woman.

Chicago: More than 50 shot, nine dead in shootings over the weekend

Chicago Police Superintendent Garry McCarthy called the violence "unacceptable," blaming it in part on a "proliferation of firearms."