Here's how Colin Kaepernick's decision to not stand during the anthem has evolved into a nationwide protest among NFL players
Broncos linebacker Brandon Marshall takes a knee during national anthem - CBS News
Colin Kaepernick, the Integrated NFL and When Protest Works
Denver Broncos Brandon Marshall Ends National Anthem Protest – Rolling Stone
NFL player Brandon Marshall gets dropped by sponsor for anthem protest
Brandon Marshall Joins Colin Kaepernick National Anthem Protest
From Colin Kaepernick's protest to a new NFL anthem policy, a timeline
Broncos linebacker Brandon Marshall kneels during National Anthem
Former Broncos LB Brandon Marshall on kneeling in 2016, current riots and more - Mile High Sports