MSNBC's Ayman Mohyeldin hosts "The Beat" for Ari Melber on Friday, 8/28 and reports on thousands gathering at the Lincoln Memorial for the 57th anniversary of the historic March on Washington. Protesters from across the country, including the families of those who died at the hands of police, condemned racial injustice. Co-host of TNT's "Inside the NBA" and former NBA player Kenny Smith joins.