Saturday at the grand opening ceremony for the National Museum of African American History and Culture, while referencing the recent police shootings, President Barack Obama said, “Within the white communities, across the nation, we see the sincerity of law enforcement officers and officials, who in fits and starts are struggling to understand, and are trying to do the right thing.” Obama said, “A museum alone will not alleviate poverty in every inner city or every rural hamlet. It won’t eliminate gun violence from all our neighborhoods, or immediately ensure that justice is always color blind. It won’t wipe away every...