Several NFL players kneel during national anthem, Colin Kaepernick calls league's social justice initiatives 'propoganda' as season begins - ABC13 Houston
Cowboys take a knee as a team before the national anthem
NFL protests: 2 years of NFL protests, explained - Vox
NFL And Players Assn. Temporarily Suspend Anthem Rules Enforcement – Deadline
Here's how NFL players protested during national anthems on Sunday, Monday of Week 1