The National African American Gun Association (NAAGA), and its chapters, are drawing more members since President Trump took office. The group now has nearly 25,000 members in the United States, and during the last 14 months has more than tripled the number of chapters, from 14 to 52. Some who belong to NAAGA say they view their participation as a means of defense against racism and a call to arms amid a continuing civil rights struggle. NewsHour Weekend Special Correspondent Simon Ostrovsky reports.