Pennsylvania Governor Orders National Guard to Philadelphia after Riots

Pennsylvania governor Tom Wolf ordered National Guardsmen to Philadelphia on Tuesday, following a night of riots that left 30 police officers injured and various businesses vandalized.The riots began after police shot and killed 27-year-old Walter Wallace Jr., an African American man, who officers said approached them with a knife. Video of the incident showed Wallace walking towards officers with his mother attempting to hold him back, and when the camera points away police fire several shots."