This weekend saw the NFL International Series match between the Baltimore Ravens and Jacksonville Jaguars play out at Wembley Stadium. 

While the Baltimore Ravens were hammered 44-7 by the Jacksonville Jaguars, one of the most controversial scenes happened before the match had even started. 

A number of players took to their knees while the US national anthem played out in protest to comments made by President Donald Trump where he suggested players who chose to sit out, take a knee or protest during the anthem should be fired.

Newstalk's Pat Kenny looks at how this form of protesting began and why. 

Tune in to Pat Kenny every weekday from 9am-12pm on Newstalk 106-108FM,  online and on our apps.