Today is Martin Luther King, Jr. Day, which leftists now love to exploit to push critical race theory and pretend they honor the black heroes of American history. But in my research of recent years, I discovered dozens of black American heroes whose courage and sacrifice shaped this country and who are barely known at all. James Armistead Lafayette went from being a slave to being one of the best spies working for the Americans during the American Revolution. Armistead Lafayette outwitted British commander Gen. Cornwallis and provided George Washington vital information that contributed to the victory at the Battle...