The Rev. Al Sharpton is criticizing efforts to mute the Black Lives Matter movement, saying a sustained protest is the only way to force change.

Sharpton spoke Saturday, a day before the two-year anniversary of the death of Eric Garner. Garner died in a police chokehold in the New York City borough of Staten Island on July 17, 2014.

Sharpton said during his weekly address at the National Action Network's "House of Justice" in Harlem that numerous unjustified killings across the country demand an outcry.

He said keeping them in the public eye will be necessary until injustice stops.

Sharpton said numerous protests create a climate for change and provide participants a sense of sanity amid rising gun-related violence.

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This story has been corrected to show that Eric Garner died in 2014, not 2004.