Mike Pence walks out of Indianapolis Colts game after players take a knee during national anthem

United States vice-president Mike Pence walked out of an NFL game today after several players took a knee during the national anthem prior to kick-off.

More than a dozen San Francisco 49ers players took a knee during the anthem prior to their game against the Colts in Indianapolis, continuing the ongoing protests against perceived racial injustice which have been staged by a number of athletes in different sports since last year.