K2 Sports: The evolution of Colin Kaepernick's NFL protest

Eli Harold, Colin Kaepernick and Eric Reid of the San Francisco 49ers kneel on the sideline during the national anthem before a game against the Dallas Cowboys on October 2, 2016 in Santa Clara, California.

First they sat, then they took a knee -- and now they're standing arm in arm. Over the past year, Colin Kaepernick's protest against police brutality and racial injustice hasn't just grown - it's become a national phenomenon.

First they sat, then they took a knee -- and now they're standing arm in arm. Over the past year, Colin Kaepernick's protest against police brutality and racial injustice hasn't just grown - it's become a national phenomenon.

Some NFL players began following his lead, along with other pro athletes, prompting reactions ranging from support to outrage.

But last weekend, President Trump weighed in on the controversy, and blasted players and the NFL as a whole.

As a result, many team owners joined players on the sidelines - locking arms in solidarity.

But for some athletes, it's been a very personal and emotional issue, one that may be getting diluted. We'll talk about that and a lot more with Brian and Andy Kamenetzky.